physical science ch 2 & 3 test review. _______ is the rate of change in position. motion
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Physical SciencePhysical Science
Ch 2 & 3Ch 2 & 3
Test ReviewTest Review
_______ is the _______ is the rate of change rate of change
in position.in position.
MotionMotion
_______ is how _______ is how far an object has far an object has
moved.moved.
DistanceDistance
_______ is the _______ is the distance from the distance from the
starting point.starting point.
DisplacementDisplacement
_______ is the _______ is the distance an distance an
object travels per object travels per unit of time.unit of time.
Speed Speed
_______ is any _______ is any change over time.change over time.
Rate Rate
_______ is the _______ is the equation for equation for
speed.speed.
Speed = Speed = distancedistance timetime
_______ is the _______ is the speed at a given speed at a given
point in timepoint in time
Instantaneous Instantaneous speedspeed
_______ is total _______ is total distance traveled distance traveled
divided by total time.divided by total time.
Average Average SpeedSpeed
_______ _______ describes both describes both the speed and the speed and direction of an direction of an
object.object.
VelocityVelocity
The difference The difference between velocity between velocity
and speed is and speed is _______._______.Direction Direction
_______ is the _______ is the rate of change in rate of change in
velocity.velocity.
AccelerationAcceleration
_______ is _______ is negative negative
acceleration.acceleration.
DecelerationDeceleration
_______ is the _______ is the equation for equation for acceleration.acceleration.
Acceleration = Acceleration = VelocityVelocity
TimeTime
The Greek letter The Greek letter
_______ (Δ) _______ (Δ)
stands for stands for
_______._______.
Delta Delta
changechange
A _______ is a A _______ is a push or pull one push or pull one body exerts on body exerts on
another.another.
ForceForce
_______ forces _______ forces are equal in size, are equal in size, but opposite in but opposite in
direction.direction.
BalancedBalanced
_______ forces _______ forces always cause a always cause a
change in motion change in motion of an object.of an object.
UnbalancedUnbalanced
_______ forces _______ forces never cause a never cause a
change in motion change in motion of an object.of an object.
BalancedBalanced
_______ force is _______ force is when two or more when two or more forces combine.forces combine.
NetNet
_______ is the reason _______ is the reason why a table cloth can why a table cloth can be quickly removed be quickly removed from a table without from a table without disturbing the place disturbing the place
settings.settings.
InertiaInertia
State Newton’s first State Newton’s first law of motion.law of motion.
An object moving at An object moving at constant velocity constant velocity
keeps moving at that keeps moving at that velocity unless a net velocity unless a net
force acts on it.force acts on it.
_______ is the _______ is the force that opposes force that opposes
motion between motion between two touching two touching
surfaces.surfaces.
FrictionFriction
State Newton’s State Newton’s second law as an second law as an
equation.equation.
F=maF=ma
_______ is the _______ is the value of value of
acceleration due acceleration due to gravity on the to gravity on the
earth.earth.
9.8 m/s9.8 m/s22
What is the What is the equation for equation for weight of an weight of an object on the object on the
earth?earth?
W = mgW = mg
_______ is the _______ is the force air exerts force air exerts
on a moving on a moving object.object.
Air ResistanceAir Resistance
_______ is the _______ is the area where two area where two
surface “bumps” surface “bumps” stick together.stick together.
Micro weldsMicro welds
State three types State three types of friction.of friction.
Static, Static, Sliding, & Sliding, &
RollingRolling
_______ friction _______ friction occurs when an occurs when an
object is not object is not moving.moving.
StaticStatic
_______ friction is the _______ friction is the force opposing motion force opposing motion
2 touching surfaces 2 touching surfaces where micro welds where micro welds constantly break & constantly break &
reform.reform.
SlidingSliding
_______ is the _______ is the highest velocity highest velocity
that will be that will be reached by a reached by a falling object.falling object.
Terminal Terminal VelocityVelocity
Terminal velocity is Terminal velocity is when _______ when _______
is equal to _______.is equal to _______.
AccelerationAcceleration
due to gravitydue to gravity
AirAir
resistanceresistance
Explain why according to Explain why according to Newton’s 2Newton’s 2ndnd law of law of
motion why players can’t motion why players can’t hit or throw a softball as hit or throw a softball as
far as a baseball.far as a baseball.Same force is applied thing Same force is applied thing with greater mass will have with greater mass will have
a slower acc., so softball a slower acc., so softball bigger mass, will be moving bigger mass, will be moving
slower than baseball.slower than baseball.
_______ is the _______ is the reason that a reason that a
person can safely person can safely parachute from a parachute from a high-flying plane.high-flying plane.
Air ResistanceAir Resistance
Why is it that you do not Why is it that you do not feel the gravitational feel the gravitational
force between your hand force between your hand and a pencil that you hold and a pencil that you hold
in your hand?in your hand?
In comparison, your In comparison, your hand is insignificanthand is insignificant
_______ is the _______ is the measure of the measure of the force of gravity force of gravity on an object.on an object.
WeightWeight
Does gravity have Does gravity have any effect on the any effect on the
mass of a mass of a substance?substance? NONO
What are the four What are the four basic forces?basic forces?
GravityGravity
ElectromagneticElectromagnetic
Weak Nuclear ForceWeak Nuclear Force
Strong Nuclear ForceStrong Nuclear Force
_______ is _______ is anything that is anything that is thrown or shot thrown or shot through the air.through the air.
ProjectileProjectile
_______ motion _______ motion of a projectile is of a projectile is due to gravity.due to gravity.
VerticalVertical
_______ _______ _______ _______ is acceleration is acceleration
toward the center toward the center of a curved or of a curved or circular path.circular path.
Centripetal Centripetal AccelerationAcceleration
_______ _______ _______ _______ is a force acting is a force acting
toward the center toward the center of a curved or of a curved or circular path.circular path.
Centripetal ForceCentripetal Force
Explain why Explain why something in orbit of something in orbit of the earth seems to the earth seems to
be weightless.be weightless.
All falling at All falling at same speedsame speed
If an object was in If an object was in circular motion, circular motion, what path would what path would
it travel if the it travel if the motion stopped?motion stopped?
Straight lineStraight line
State Newton’s State Newton’s third law of third law of
motion.motion.
For every action For every action there is an equal but there is an equal but
opposite reactionopposite reaction
According to According to Newton’s third Newton’s third law of motion, law of motion, forces come in forces come in
_______._______.pairspairs
_______ is a _______ is a property that a property that a moving object moving object has because of has because of it’s mass and it’s mass and
velocity.velocity.
MomentumMomentum
_______ is the _______ is the equation for equation for momentum. momentum.
p = m vp = m v
State the law of State the law of conservation of conservation of
momentum.momentum.Momentum can Momentum can
neither be created neither be created nor destroyed it just nor destroyed it just
changes formschanges forms
_______ states that _______ states that momentum can momentum can
neither be created neither be created nor destroyed it just nor destroyed it just
changes forms.changes forms.
Law of Conservation Law of Conservation of Momentumof Momentum