SS Review for FinalJune 16, 2004

Velocity is to speed as Velocity is to speed as displacement is to displacement is to

(A) acceleration (A) acceleration (B) momentum(B) momentum(C) time (C) time (D) distance(D) distance

The diagram shows a resultant vector, The diagram shows a resultant vector, R. Which diagram best represents R. Which diagram best represents a pair of component vectors, A and B, that a pair of component vectors, A and B, that would combine to form resultant vector R?would combine to form resultant vector R?

A person is standing on a bathroom scale A person is standing on a bathroom scale in an elevator car. If the scale reads a in an elevator car. If the scale reads a value greater than the weight of the value greater than the weight of the person at rest, the elevator car could be person at rest, the elevator car could be movingmoving(A) downward at constant speed(A) downward at constant speed(B) upward at constant speed(B) upward at constant speed(C) downward at increasing speed(C) downward at increasing speed(D) upward at increasing speed(D) upward at increasing speed

The diagram represents the path of an object The diagram represents the path of an object after it was thrown. What happens to the after it was thrown. What happens to the object’s acceleration as itobject’s acceleration as ittravels from travels from A A to to BB? ? (A) It decreases.(A) It decreases.(B) It increases.(B) It increases.(C) It remains the same.(C) It remains the same.

A 0.2-kg red ball is thrown horizontally at a A 0.2-kg red ball is thrown horizontally at a speed of 4 m/s from a height of 3 meters. A 0.4-speed of 4 m/s from a height of 3 meters. A 0.4-kgkg green ball is thrown horizontally from the green ball is thrown horizontally from the same height at a speed of 8 m/s. Compared to same height at a speed of 8 m/s. Compared to the time it takes the red ball to reach the ground, the time it takes the red ball to reach the ground, the time it takes the green ball to reach the the time it takes the green ball to reach the ground isground is

(A) one-half as great (A) one-half as great (B) the same(B) the same(C) twice as great (C) twice as great (D) four times as great(D) four times as great

The acceleration due to gravity on the surface The acceleration due to gravity on the surface of planet of planet X X is 19.6 meters per secondis 19.6 meters per second22. If an . If an object on the surface of this planet weighs 980 object on the surface of this planet weighs 980 Newtons, the mass of the object isNewtons, the mass of the object is

(A) 50.0 kg (A) 50.0 kg (B) 490 N(B) 490 N(C) 100 kg (C) 100 kg (D) 908 N(D) 908 N

A basketball player jumped straight up to grab A basketball player jumped straight up to grab a rebound. If she was in the air for 0.80 a rebound. If she was in the air for 0.80 second, how high did she jump?second, how high did she jump?

(A) 0.50 m (A) 0.50 m (B) 1.2 m(B) 1.2 m(C) 0.78 m (C) 0.78 m (D) 3.1 m(D) 3.1 m

The force required to start an object sliding across a The force required to start an object sliding across a uniform horizontal surface is larger than the force uniform horizontal surface is larger than the force required to keep the object sliding at a constant required to keep the object sliding at a constant velocity. The magnitudes of the required forces are velocity. The magnitudes of the required forces are different in these situations because the force of different in these situations because the force of kinetic frictionkinetic friction(A) is greater than the force of static friction(A) is greater than the force of static friction(B) is less than the force of static friction(B) is less than the force of static friction(C) increases as the speed of the object relative to (C) increases as the speed of the object relative to the surface increasesthe surface increases(D) decreases as the speed of the object relative to (D) decreases as the speed of the object relative to the surface increasesthe surface increases

A 50-kilogram student threw a 0.40-A 50-kilogram student threw a 0.40-kilogram ball with a speed of 20 meters kilogram ball with a speed of 20 meters per second. What was the magnitude of per second. What was the magnitude of the impulse that the studentthe impulse that the studentexerted on the ball?exerted on the ball?

(A) 8.0 N•s (A) 8.0 N•s (B) 4.0 × 10(B) 4.0 × 1022 N•s N•s(C) 78 N•s (C) 78 N•s (D) 1.0 × 10(D) 1.0 × 1033 N•s N•s

A man is pushing a baby stroller. Compared to A man is pushing a baby stroller. Compared to the magnitude of the force exerted on the the magnitude of the force exerted on the stroller by the man, the magnitude of the force stroller by the man, the magnitude of the force exerted on the man by the stroller isexerted on the man by the stroller is

(A) zero(A) zero(B) smaller, but greater than zero(B) smaller, but greater than zero(C) larger(C) larger(D) the same(D) the same

The work done in moving a block across a The work done in moving a block across a rough surface and the heat energy gained by rough surface and the heat energy gained by

the block can both be measured inthe block can both be measured in

(A) Watts (A) Watts (B) Newtons(B) Newtons(C) Degrees (C) Degrees (D) Joules(D) Joules

Two weightlifters, one 1.5 meters tall and one Two weightlifters, one 1.5 meters tall and one 2.0 meters tall, raise identical 50-kilogram 2.0 meters tall, raise identical 50-kilogram masses above their heads. Compared to the masses above their heads. Compared to the work done by the weightlifter who is 1.5 work done by the weightlifter who is 1.5 meters tall, the work done by the weightlifter meters tall, the work done by the weightlifter who is 2.0 meters tall iswho is 2.0 meters tall is

(A) less(A) less(B) greater(B) greater(C) the same(C) the same

A 45.0-kilogram boy is riding a 15.0-A 45.0-kilogram boy is riding a 15.0-kilogram bicycle with a speed of 8.00 meters kilogram bicycle with a speed of 8.00 meters per second. What is the combined kinetic per second. What is the combined kinetic energy of the boy and the bicycle?energy of the boy and the bicycle?

(A) 240. J (A) 240. J (B) 1440 J(B) 1440 J(C) 480 J (C) 480 J (D) 1920 J(D) 1920 J

A 5-newton force causes a spring to stretch A 5-newton force causes a spring to stretch 0.2 meter. What is the potential energy stored 0.2 meter. What is the potential energy stored in the stretched spring?in the stretched spring?

(A) 1 J (A) 1 J (B) 0.2 J(B) 0.2 J(C) 0.5 J (C) 0.5 J (D) 0.1 J(D) 0.1 J

A 40-kilogram student runs up a staircase to a A 40-kilogram student runs up a staircase to a floor that is 5.0 meters higher than her starting floor that is 5.0 meters higher than her starting point in 7.0 seconds. The student’s power point in 7.0 seconds. The student’s power output is output is

(A) 29 W (A) 29 W (B) 1.4 × 10(B) 1.4 × 1033 W W(C) 280 W (C) 280 W (D) 1.4 × 10(D) 1.4 × 1044 W W

Which type of field is present near a moving Which type of field is present near a moving electric charge?electric charge?

(A) an electric field, only(A) an electric field, only(B) a magnetic field, only(B) a magnetic field, only(C) both an electric field and a magnetic field(C) both an electric field and a magnetic field(D) neither an electric field nor a magnetic (D) neither an electric field nor a magnetic

fieldfield

A negatively charged plastic comb is brought A negatively charged plastic comb is brought close to, but does not touch, a small piece of close to, but does not touch, a small piece of paper. If the comb and the paper are attracted paper. If the comb and the paper are attracted to each other, the charge on the paperto each other, the charge on the paper

(A) may be negative or neutral(A) may be negative or neutral(B) may be positive or neutral(B) may be positive or neutral(C) must be negative(C) must be negative(D) must be positive(D) must be positive

The current traveling from the cathode to the The current traveling from the cathode to the screen in a television picture tube isscreen in a television picture tube is5.0 × 105.0 × 10–5–5 ampere. How many electrons strike ampere. How many electrons strike the screen in 5.0 seconds? (1 C = the screen in 5.0 seconds? (1 C = 6.24×106.24×101818)

(A) 3.1 × 10(A) 3.1 × 1024 24

(B) 1.6 × 10(B) 1.6 × 101515

(C) 6.3 × 10(C) 6.3 × 1018 18

(D) 1.0 × 10(D) 1.0 × 1055

A moving electron is deflected by two A moving electron is deflected by two oppositely charged parallel plates, as shown in oppositely charged parallel plates, as shown in the diagram. The electric field between the the diagram. The electric field between the plates is directed fromplates is directed from

(A) (A) A A to to B B (B) (B) C C to to DD(C) (C) B B to to A A (D) (D) D D to to CC

The diagram shows two identical metal spheres, A and B, separated by distance d. Each sphere has

mass m and possesses charge q.Which diagram best represents the electrostatic force Fe and the gravitational force Fg acting on sphere B

due to sphere A?

The electric circuit consists of a 12-volt The electric circuit consists of a 12-volt battery, a 3.0-ohm resistor, R1, and a variable battery, a 3.0-ohm resistor, R1, and a variable resistor, R2. At what value must the variable resistor, R2. At what value must the variable resistor be set to produce a current of 1.0 resistor be set to produce a current of 1.0 ampere through R1?ampere through R1?

(A) 6.0 Ω (A) 6.0 Ω (B) 3.0 Ω(B) 3.0 Ω(C) 9.0 Ω (C) 9.0 Ω (D) 12 Ω(D) 12 Ω

A single vibratory disturbance moving A single vibratory disturbance moving through a medium is calledthrough a medium is called

(A) a node (A) a node (B) a standing wave(B) a standing wave(C) an antinode (C) an antinode (D) a pulse(D) a pulse

An electric bell connected to a battery is sealed An electric bell connected to a battery is sealed inside a large jar. What happens as the air is inside a large jar. What happens as the air is removed from the jar?removed from the jar?(A) The electric circuit stops working because (A) The electric circuit stops working because

electromagnetic radiation can electromagnetic radiation can not not travel travel through a vacuum.through a vacuum.

(B) The bell’s pitch decreases because the (B) The bell’s pitch decreases because the frequency of the sound waves is lower in a frequency of the sound waves is lower in a vacuum than in air.vacuum than in air.

(C) The bell’s loudness increases because of (C) The bell’s loudness increases because of decreased air resistance.decreased air resistance.

(D) The bell’s loudness decreases because sound (D) The bell’s loudness decreases because sound waves can waves can not not travel through a vacuum.travel through a vacuum.

As a sound wave passes from water, where the As a sound wave passes from water, where the speed is 1.49 × 10speed is 1.49 × 1033 meters per second, into air, the meters per second, into air, the wave’s speed wave’s speed

(A) decreases and its frequency remains the same(A) decreases and its frequency remains the same(B) increases and its frequency remains the same(B) increases and its frequency remains the same(C) remains the same and its frequency decreases(C) remains the same and its frequency decreases(D) remains the same and its frequency increases(D) remains the same and its frequency increases

Which phenomenon occurs when an object Which phenomenon occurs when an object absorbs wave energy that matches the object’s absorbs wave energy that matches the object’s natural frequency?natural frequency?

(A) reflection (A) reflection (B) resonance(B) resonance(C) diffraction (C) diffraction (D) interference(D) interference

A wave is diffracted as it passes through an A wave is diffracted as it passes through an opening in a barrier. The amount of diffraction opening in a barrier. The amount of diffraction that the wave undergoes depends on both thethat the wave undergoes depends on both the

(A) amplitude and frequency of the incident (A) amplitude and frequency of the incident wavewave

(B) wavelength and speed of the incident wave(B) wavelength and speed of the incident wave(C) wavelength of the incident wave and the (C) wavelength of the incident wave and the

size of the openingsize of the opening(D) amplitude of the incident wave and the (D) amplitude of the incident wave and the

size of the openingsize of the opening

A source of waves and an observer are moving A source of waves and an observer are moving relative to each other. The observer will detect relative to each other. The observer will detect a steadily increasing frequency if a steadily increasing frequency if

(A) he moves toward the source at a constant (A) he moves toward the source at a constant speedspeed

(B) the source moves away from him at a (B) the source moves away from him at a constant speedconstant speed

(C) he accelerates toward the source(C) he accelerates toward the source(D) the source accelerates away from him(D) the source accelerates away from him

Which wave diagram has Which wave diagram has both both wavelength (λ) wavelength (λ) and amplitude (and amplitude (AA) labeled correctly?) labeled correctly?

A laser beam is A laser beam is directed at the directed at the surface of a surface of a smooth, calm smooth, calm pond. Which pond. Which organisms could organisms could be illuminated by the laser light?be illuminated by the laser light?

(A) the bird and the fish (A) the bird and the fish (B) the crab and the seaweed(B) the crab and the seaweed(C) the bird and the seaweed (C) the bird and the seaweed (D) the crab and the fish(D) the crab and the fish

The diagram below represents two waves of The diagram below represents two waves of equal amplitude and frequency approaching equal amplitude and frequency approaching point point P P as they move through the same as they move through the same medium. As the two waves pass through each medium. As the two waves pass through each other, the medium at point other, the medium at point P P will will

(A) vibrate up and down (A) vibrate up and down (B) vibrate into and out of the page(B) vibrate into and out of the page(C) vibrate left and right (C) vibrate left and right (D) remain stationary(D) remain stationary

A constant unbalanced force is applied to an A constant unbalanced force is applied to an object for a period of time. Which graph best object for a period of time. Which graph best represents the acceleration of the object as a represents the acceleration of the object as a function of elapsed time?function of elapsed time?

The graph represents the kinetic energy, gravitational The graph represents the kinetic energy, gravitational potential energy, and total mechanical energy of a potential energy, and total mechanical energy of a moving block. Which best describes the motion of the moving block. Which best describes the motion of the block?block?(A) accelerating on a flat horizontal surface (A) accelerating on a flat horizontal surface (B) falling freely(B) falling freely(C) sliding up a frictionless incline (C) sliding up a frictionless incline (D) being lifted at constant velocity(D) being lifted at constant velocity

The diameter of a United States penny is The diameter of a United States penny is closest toclosest to

(A) 100 m (A) 100 m (B) 10(B) 10–1–1 m m (C) 10(C) 10–2–2 m m(D) 10(D) 10–3–3 m m

A 20-ohm resistor and a A 20-ohm resistor and a 30-ohm resistor are connected 30-ohm resistor are connected in parallel to a 12-volt battery as shown. An in parallel to a 12-volt battery as shown. An ammeter is connected as shown. What is the ammeter is connected as shown. What is the equivalent resistance of the circuit?equivalent resistance of the circuit?(A) 10. Ω (A) 10. Ω (B) 25 Ω(B) 25 Ω(C) 12 Ω (C) 12 Ω (D) 50. Ω(D) 50. Ω

A 20-ohm resistor and a A 20-ohm resistor and a 30-ohm resistor are connected 30-ohm resistor are connected in parallel to a 12-volt battery as shown. An in parallel to a 12-volt battery as shown. An ammeter is connected as shown. What is the ammeter is connected as shown. What is the current reading of the ammeter?current reading of the ammeter?(A) 1.0 A (A) 1.0 A (B) 0.40 A(B) 0.40 A(C) 0.60 A (C) 0.60 A (D) 0.20 A(D) 0.20 A

A 20-ohm resistor and a A 20-ohm resistor and a 30-ohm resistor are connected 30-ohm resistor are connected in parallel to a 12-volt battery as shown. An in parallel to a 12-volt battery as shown. An ammeter is connected as shown. What is the ammeter is connected as shown. What is the power of the 30-ohm resistor?power of the 30-ohm resistor?(A) 4.8 W (A) 4.8 W (B) 12 W(B) 12 W(C) 30 W(C) 30 W(D) 75 W(D) 75 W

Which graph best represents the relationship Which graph best represents the relationship between the magnitude of the electric field between the magnitude of the electric field strength, strength, E, E, around a point charge and the around a point charge and the distance, distance, rr, from the point charge?, from the point charge?

Several pieces of copper wire, all having the Several pieces of copper wire, all having the same length but different diameters, are kept at same length but different diameters, are kept at room temperature. Which graph best represents room temperature. Which graph best represents the resistance, the resistance, RR, of the wires as a function of , of the wires as a function of their cross-sectional areas, their cross-sectional areas, AA??

The combined mass of a race car and its The combined mass of a race car and its driver is 600. kilograms. Traveling at driver is 600. kilograms. Traveling at constant speed, the car completes one lap constant speed, the car completes one lap around a circular track of radius 160 meters around a circular track of radius 160 meters in 36 seconds.in 36 seconds.

Calculate the angular velocity of the car in Calculate the angular velocity of the car in rpm. rpm.

The combined mass of a race car and its The combined mass of a race car and its driver is 600. kilograms. Traveling at driver is 600. kilograms. Traveling at constant speed, the car completes one lap constant speed, the car completes one lap around a circular track of radius 160 meters around a circular track of radius 160 meters in 36 seconds.in 36 seconds.

Calculate the speed of the car in m/s. Calculate the speed of the car in m/s.

The combined mass of a race car and its The combined mass of a race car and its driver is 600 kilograms. Traveling at constant driver is 600 kilograms. Traveling at constant speed, the car completes one lap around a speed, the car completes one lap around a circular track of radius 160 meters in 36 circular track of radius 160 meters in 36 seconds.seconds.

Calculate the magnitude of the centripetal acceleration of the car in m/s2.

The combined mass of a race car and its The combined mass of a race car and its driver is 600 kilograms. Traveling at constant driver is 600 kilograms. Traveling at constant speed, the car completes one lap around a speed, the car completes one lap around a circular track of radius 160 meters in 36 circular track of radius 160 meters in 36 seconds.seconds.

Calculate the magnitude of the centripetal force of the car in N.

An 8.00-kilogram ball is fired horizontally An 8.00-kilogram ball is fired horizontally from a 1.00 × 10from a 1.00 × 1033-kilogram cannon initially at -kilogram cannon initially at rest. After having been fired, the momentum rest. After having been fired, the momentum of the ball is 2.40 × 10of the ball is 2.40 × 1033 kg•m/s kg•m/seast. east. Calculate the magnitude of the cannon’s Calculate the magnitude of the cannon’s velocity in m/s after the ball is fired.velocity in m/s after the ball is fired.

An 8.00-kilogram ball is fired horizontally An 8.00-kilogram ball is fired horizontally from a 1.00 × 10from a 1.00 × 1033-kilogram cannon initially at -kilogram cannon initially at rest. After having been fired, the momentum rest. After having been fired, the momentum of the ball is 2.40 × 10of the ball is 2.40 × 1033 kg•m/s kg•m/seast. east. Identify the magnitude of the cannonball’s Identify the magnitude of the cannonball’s velocity velocity in m/sin m/s after the ball is fired.after the ball is fired.

During a 5.0-second interval, an object’s During a 5.0-second interval, an object’s velocity changes from 25 meters per velocity changes from 25 meters per second east to 15 meters per second east. second east to 15 meters per second east.

Determine the magnitude of the object’s Determine the magnitude of the object’s acceleration in m/sacceleration in m/s22..

A student conducted an experiment to determine the resistance of a light bulb. As she applied various potential differences to the bulb, she recorded the voltages and corresponding currents.According to the graph, as the potential difference increased, the resistance of the light bulb

(A) decreased(B) increased(C) changed, but there is not enough information to

know which way

A student plucks a guitar string and the vibrationsproduce a sound wave with a frequency of 650 hertz. The sound wave produced can best be described as a

(A) transverse wave of constant amplitude(B) longitudinal wave of constant frequency(C) mechanical wave of varying frequency(D) electromagnetic wave of varying wavelengths

A student plucks a guitar string and the A student plucks a guitar string and the vibrations produce a sound wave with a vibrations produce a sound wave with a

frequency of 650 hertz. frequency of 650 hertz.

Calculate the wavelength in m of the sound Calculate the wavelength in m of the sound wave in air at STP.wave in air at STP.

A beam of light travels through medium X with a speed of 1.80 × 108 meters per second.

Calculate the absolute index of refraction of medium X.

A projectile has an initial horizontal velocity of 15 meters per second and an

initial vertical velocity of 25 m/s.

Determine the projectile’s horizontal displacement (in m) if the total time of

flight is 5.0 seconds.

A projectile has an initial horizontal velocity of 15 meters per second and an

initial vertical velocity of 25 m/s.

Determine the maximum height of the projectile (in m) if the total time of flight

is 5.0 seconds.

A net force of 25 Newtons is applied horizontally to a 10-kilogram block resting on a table. What is the magnitude of the acceleration of the block?

(A) 0.0 m/s2 (B) 0.40 m/s2

(C) 0.26 m/s2 (D) 2.5 m/s2

The speed of a car is increased uniformly from 20 meters per second to 30 meters per second in 4.0 seconds. The magnitude of the car’s average acceleration in this 4.0-second interval is(A) 0.40 m/s2 (B) 10 m/s2

(C) 2.5 m/s2 (D) 13 m/s2

A roller coaster, traveling with an initial speed of 15 m/s, decelerates uniformly at –7.0 m/s2 to a full stop. Approximately how far does the roller coaster travel during its deceleration?

(A) 1.0 m(B) 2.0 m (C) 16 m(D) 32 m

A 0.40-kg stone attached to a string. The stone is moving at a constant speed of 4.0 m/s in a horizontal circle having a radius of 0.80 meter. What is the magnitude of the centripetal acceleration in m/s2?

A 0.40-kg stone attached to a string. The stone is moving at a constant speed of 4.0 m/s in a horizontal circle having a radius of 0.80 meter. What is the magnitude of the centripetal force in N?

A box is at rest on an inclined plane. Which vector best represents the direction of the normal force acting on the box?(A) A (B) B (C) C (D) D

If the magnitude of the gravitational force of Earth on the Moon is F, the magnitude of the gravitational force of the Moon on Earth is

(A) smaller than F (B) larger than F (C) equal to F

Which term represents a scalar quantity?

(A) distance(B) force (C) displacement(D) weight

A block weighing 15 Newtons is pulled to the top of an incline that is 0.20 meter above the ground. If 4.0 joules of work are needed to pull the block the full length of the incline, how much work is done against friction?

(A) 1.0 J (B) 0.0 J (C) 3.0 J (D) 7.0 J

As a spring is stretched, its elastic potential energy

(A) decreases (B) increases (C) remains the same

A 1.0-kilogram rubber ball traveling east at 4.0 m/s hits a wall and bounces back toward the west at 2.0 m/s. Compared to the kinetic energy of the ball before it hits the wall, the kinetic energy of the ball after it bounces off the wall is

(A) one-fourth as great(B) the same (C) one-half as great(D) four times as great

An electroscope is a device with a metal knob, a metal stem, and freely hanging metal leaves used to detect charges. The leaf electroscope is positively charged. As a positively charged glass rod is brought near the knob of the electroscope, the separation of the electroscope leaves will

(A) decrease (B) increase (C) remain the same

In the circuit diagram, what are the correct readings of voltmeters V1 and V2?

(A) V1 reads 2.0 V and V2 reads 4.0 V (B) V1 reads 4.0 V and V2 reads 2.0 V (C) V1 reads 3.0 V and V2 reads 3.0 V (D) V1 reads 6.0 V and V2 reads 6.0 V

A physics student notices that 4.0 waves arrive at the beach every 20 seconds. The frequency of these waves is

(A) 0.20 Hz(B) 16 Hz (C) 5.0 Hz(D) 80 Hz

An electric guitar is generating a sound of constant frequency. An increase in which sound wave characteristic would result in an increase in loudness?

(A) speed (B) period(C) wavelength (D) amplitude

How many wavelengths separate point A and point B?

(A) 1.0(B) 3.0 (C) 1.5(D) 0.75

In a demonstration, a vibrating tuning fork causes a nearby second tuning fork to begin to vibrate with the same frequency. Which wave phenomenon is illustrated by this demonstration?

(A) the Doppler effect (B) nodes(C) resonance (D) interference

The wave fronts spread into the region behind a barrier. Which wave phenomenon is represented in the diagram? (1) reflection (2) refraction(3) diffraction (4) standing waves

A wave pattern is produced by two sources located at points A and B. Which phenomenon occurs at the intersections of the circular wave fronts?

(A) diffraction(B) refraction (C) interference(D) reflection

Which is an acceptable unit for impulse?

(A) N•m (B) J/s(C) J•s (D) kg•m/s

The centers of two 15.0-kilogram spheres are separated by 3.00 meters. The magnitude of the gravitational force between the two spheres is approximately

(A) 1.11 × 10–10 N(B) 1.67 × 10–9 N (C) 3.34 × 10–10 N(D) 5.00 × 10–9 N

During a collision, an 84-kilogram driver of a car moving at 24 meters per second is brought to rest by an inflating air bag in 1.2 seconds. The magnitude of the force exerted on the driver by the air bag is approximately

(A) 7.0×101 N(B) 1.7×103 N (C) 8.2×102 N(D) 2.0×103 N

An apple weighing 1 Newton on the surface of Earth has a mass of approximately

(A) 1×10–1 kg(B) 1×100 kg(C) 1×101 kg (D) 1×102 kg

In raising an object vertically at a constant speed of 2.0 meters per second, 10 Watts of power is developed. The weight of the object is

(A) 5.0 N(B) 40 N (C) 20 N(D) 50 N

Which diagram best represents magnetic flux lines around a bar magnet?

In which situation is the net force on the object equal to zero?

(A) a satellite moving at constant speed around Earth in a circular orbit(B) an automobile braking to a stop (C) a bicycle moving at constant speed on a straight, level road (D) a pitched baseball being hit by a bat

A 2.00 × 106-hertz radio signal is sent a distance of 7.30 × 1010 meters from Earth to a spaceship orbiting Mars. Approximately how much time does it take the radio signal to travel from Earth to the spaceship?

(1) 4.11×10-3 s (2) 2.43×102 s(3) 2.19×108 s (4) 1.46×1017 s

The spaceship is moving away from Earth when it receives a radio signal from Earth. Compared to the frequency of the signal sent from Earth, the frequency of the signal received by the spaceship is

(A) lower (B) higher (C) the same

What is the total resistance of the circuit segment?

(A) 1.0 (B) 9.0 (C) 3.0 (D) 27

A 4.0-kilogram cart is moving to the right and a 6.0-kilogram cart moving to the left on a horizontal frictionless surface. When the two carts collide they lock together. The magnitude of the total momentum of the two-cart system after the collision is

(A) 0.0 kg•m/s (B) 6.0 kg•m/s(C) 15 kg•m/s (D) 30 kg•m/s

A 10.0-kilogram mass are held at rest on a frictionless 30.0° incline by force F. What is the approximate magnitude of force F?

(A) 9.81 N(B) 85.0 N (C) 49.1 N(D) 98.1 N

An archer uses a bow to fire two similar arrows with the same string force. One arrow is fired at an angle of 60° with the horizontal, and the other is fired at an angle of 45° with the horizontal. Compared to the arrow fired at 60°, the arrow fired at 45° has a

(A) longer flight time and longer horizontal range (B) longer flight time and shorter horizontal range (C) shorter flight time and longer horizontal range (D) shorter flight time and shorter horizontal range

85

The graph shows the velocity of a race car moving along a straight line as a function of time. What is the magnitude of the displacement of the car from t = 2.0 seconds to t = 4.0 seconds?

(A) 20 m(B) 40 m(C) 60 m(D) 80 m

Which vector diagram represents the greatest magnitude of displacement for an object?

Which circuit diagram shows voltmeter V and ammeter A correctly positioned to measure the total potential difference of the circuit and the current through each resistor?

What is the total electrical energy used by a 1500-watt hair dryer operating for

6.0 minutes?

(A) 4.2 J (B) 250 J(C) 9.0×103 J (D) 5.4×105 J

A periodic transverse wave has an amplitude of 0.20 meter and a wavelength of 3.0 meters. If the frequency of this wave is 12 Hz, what is its speed?(A) 0.25 m/s (C) 36 m/s (B) 12 m/s (D) 4.0 m/s

A child is flying a kite, K. A student at point B, located 100. meters away from point A (directly underneath the kite), measures the angle of elevation of the kite from the ground as 30°. Determine the height, AK, in meters of the kite.

A child is flying a kite, K. A student at point B, located 100. meters away from point A (directly underneath the kite), measures the angle of elevation of the kite from the ground as 30°. A small lead sphere is dropped from the kite. Calculate the amount of time required for the sphere to fall to the ground.