![Page 1: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/1.jpg)
![Page 2: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/2.jpg)
Work and Energy5. What is a force?
a. change in speed over timeb. the tendency to resist change in
motionc. a push or pulld. apparent weightlessness
![Page 3: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/3.jpg)
Work and Energy5. What is a force?
a. change in speed over timeb. the tendency to resist change in
motionc. a push or pulld. apparent weightlessness
![Page 4: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/4.jpg)
Work and Energy9. What is the result of a net force
acting on an object? a. the object will accelerateb. the object remain motionlessc. the object’s velocity will not changed. inertia is greater than net forces
![Page 5: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/5.jpg)
Work and Energy9. What is the result of a net force
acting on an object? a. the object will accelerateb. the object remain motionlessc. the object’s velocity will not changed. inertia is greater than net forces
![Page 6: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/6.jpg)
Work and EnergyWhich of the following does NOT
represent work being done.a. You lift a 4 kg box 1.5 m to the table.b. You pull a wagon 10 meters.c. You hold the door open for your mom.d. You push a desk across the floor.
![Page 7: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/7.jpg)
Work and EnergyWhich of the following does NOT
represent work being done.a. You lift a 4 kg box 1.5 m to the table.b. You pull a wagon 10 meters.c. You hold the door open for your mom.
Why?d. You push a desk across the floor.
![Page 8: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/8.jpg)
Work and EnergyWhich of the following does NOT
represent work being done.c. You hold the door open for your
mom. Why?Even though you apply force to to keep
the door open, the door does not move.
![Page 9: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/9.jpg)
Work and EnergyThe amount of work done in a
specified amount of time is calleda. joulesb. resistancec. powerd. Mechanical advantage
![Page 10: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/10.jpg)
Work and EnergyThe amount of work done in a
specified amount of time is calleda. joulesb. resistancec. powerd. Mechanical advantage
![Page 11: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/11.jpg)
Work and EnergyAn object that is only acting under the
influence of gravity is ___________a. deceleratingb. in free fallc. stationaryd. weightless
![Page 12: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/12.jpg)
Work and EnergyAn object that is only acting under the
influence of gravity is ___________a. deceleratingb. in free fallc. stationaryd. weightless
![Page 13: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/13.jpg)
Work and EnergyFor every force there is an equal and
opposite reaction force is a. Newton's 1st Law of Motion
b. Newton's 2nd of Motionc. Newton's 3rd Law of Motiond. Newton's 4th Law of Motion
![Page 14: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/14.jpg)
Work and EnergyFor every force there is an equal and
opposite reaction force is a. Newton's 1st Law of Motionb. Newton's 2nd of Motionc. Newton's 3rd Law of Motiond. Newton's 4th Law of Motion
![Page 15: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/15.jpg)
Work and EnergyWhat is the gravitational acceleration
constant on earth?a. 9.8 m/sb. 98 m/sc. 9.8 m/s2
d. 982 mph
![Page 16: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/16.jpg)
Work and EnergyWhat is the gravitational acceleration
constant on earth?a. 9.8 m/sb. 98 m/sc. 9.8 m/s2
d. 982 mph
![Page 17: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/17.jpg)
Work and EnergyWhich state of matter is completely compressed, retains its shape, and represents the lowest form of kinetic energy among its molecules?
Drop of a Bullet
![Page 18: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/18.jpg)
Work and EnergyWhich state of matter is completely compressed, retains its shape, and represents the lowest form of kinetic energy among its molecules?
solids
Drop of a Bullet
![Page 19: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/19.jpg)
Work and EnergyWhat is the equation for calculating kinetic
energy?
Drop of a Bullet
![Page 20: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/20.jpg)
Work and EnergyWhat is the equation for calculating kinetic
energy?KE = ½ mv2
OR
Drop of a Bullet
2mvKE=2
![Page 21: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/21.jpg)
Work and EnergyKinetic energy is expressed in what units?
Drop of a Bullet
![Page 22: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/22.jpg)
Work and EnergyEnergy is measured in what units?
JoulesJ
Drop of a Bullet
![Page 23: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/23.jpg)
Work and EnergyWhat is the kinetic energy of a 5kg object
traveling at 10m/s?
Drop of a Bullet
![Page 24: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/24.jpg)
Work and EnergyWhat is the kinetic energy of a 5kg object
traveling at 10m/s?KE = ½ mv2
KE = 5kg x (10m/s)2
2= 250 J
Drop of a Bullet
![Page 25: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/25.jpg)
Work and EnergyWhat is the equation for calculating
gravitational potential energy?
Drop of a Bullet
![Page 26: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/26.jpg)
Work and EnergyWhat is the equation for calculating
potential energy? PE = mgh
What do the letters stand for?
![Page 27: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/27.jpg)
Work and EnergyWhat is the equation for calculating
potential energy? PE = mgh
What do the letters stand for?m = mass g = gravity (9.8m/s2)
h = height of the object in m
![Page 28: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/28.jpg)
Work and EnergyA 1.5 kg coconut hangs in a palm tree?
How much gravitational potential energy does the coconut have if the tree is 15 meters tall?
Drop of a Bullet
![Page 29: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/29.jpg)
Work and EnergyA 1.5 kg coconut hangs in a palm tree?
How much gravitational potential energy does the coconut have if the tree is 15 meters tall?
PE = mgh= (1.5 kg)(9.8m/s2)(15 m)
220 J
Drop of a Bullet
![Page 30: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/30.jpg)
Work and EnergyA rollercoaster car with a mass of 500 kg
has 600 J of potential energy. How tall is the rollercoaster?
PE = mgh so = 600 kJ/(9.8m/s2 x 500kg)
= 122 m
Drop of a Bullet
PE hgm
![Page 31: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/31.jpg)
Work and EnergyWhat is the mechanical energy of a 40 kg
child swinging at the moment her velocity is 20 m/s and she is 2 m off of the ground?
Drop of a Bullet
![Page 32: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/32.jpg)
Work and EnergyWhat is the mechanical energy of a 40 kg
child swinging at the moment her velocity is 20 m/s and she is 2 m off of the ground?
Hint: Mechanical Energy = KE + PE Calculate each and sum.
Drop of a Bullet
![Page 33: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/33.jpg)
Work and EnergyCalculate the mechanical energy of a 40 kg
child swinging at the moment her velocity is 20 m/s and she is 2 m off of the ground?
Hint: Mechanical Energy = KE + PE
Drop of a Bullet
2
2mv mgh
![Page 34: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/34.jpg)
Work and EnergyCalculate the mechanical energy of a 40 kg
child swinging at the moment her velocity is 20 m/s and she is 2 m off of the ground?
Hint: Mechanical Energy = KE + PE
Drop of a Bullet
2
2
2
40 2040 9.8 2 8784
2
mkg s mkg m Js
![Page 35: Work and Energy 5. What is a force? a. change in speed over time b. the tendency to resist change in motion c. a push or pull d. apparent weightlessness](https://reader035.vdocuments.net/reader035/viewer/2022062401/5a4d1b797f8b9ab0599b86da/html5/thumbnails/35.jpg)
Work and EnergyWhat is the mechanical energy of a 40 kg
child swinging at the moment her velocity is 20 m/s and she is 2 m off of the ground?
PE = mgh so = 600 kJ/(9.8m/s2 x 500kg)
= 122 m
Drop of a Bullet
PE hgm