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- 1. Multiple Choice
The ability to do work or cause change:
work
energy
momentum
power
- 2. Multiple Choice
Energy in the form of motion.
mechanical energy
potential energy
kinetic energy
momentum
- 3. Multiple Choice
Stored energy in the form of position or condition.
potential energy
kinetic energy
momentum
mechanical energy
- 4. Multiple Choice
A soccer player kicks a ball with 20 Newtons of force causing it to travel 100 meters. How much work is done on the ball?
200 J
80 J
5 J
2000 J
- 5. Multiple Choice
A worker climbs a ladder and does 8 J of work on a 2 N object. What is the distance they lift the object?
18 m
4 m
10 m
6 m
- 6. Multiple Choice
Where is the kinetic energy of pendulum at its highest?
at the top of the swing
at the bottom of the swing
at 1/4 of the swing
at 3/4 of the swing
- 7. Multiple Choice
At which point of this roller coaster is the energy 1/2 kinetic and 1/2 potential?
A
B
C
D
- 8. Multiple Choice
Two workers use 100 N of force to move a sofa 2 meters in 2 seconds. How much power is required?
100 watts
400 watts
104 watts
50 watts
- 9. Multiple ChoiceEnergy from a compressed spring would be an example of...kineticelasticgravitationalchemical
- 10. Multiple ChoiceHow much work is being done with 200 N of force over 426 meters?85,200 J45,620 J90,480 J62,329 J
- 11. Multiple Choice
The SI unit for power is...?
Watts
Joules
Newtons
Metres
- 12. Multiple ChoiceThe faster an object moves, the ________ kinetic energy it has.morelessnone of the aboveall of the above
- 13. Multiple ChoiceWhat is the formula for calculating the total amount of mechanical energy?ME = KE + PEKE = ME + PEPE = KE + MEME = 1/2 mv2
- 14. Multiple ChoiceWhat is the energy of position or shape that depends on weight and height, also called stored energy?EnergyKinetic energyPotential energySound energy
- 15. Multiple Choice
Suppose a cart has a kinetic energy of 0.5 J. If you add enough mass to double the mass and make the cart go three times as fast, its kinetic energy is now ---.
6 J
3 J
18 J
9 J
- 16. Multiple Choice
Two equal mass marbles are at the top of a ramp. One marble falls to the ground off the back while the other rolls down the ramp. What is true about the marbles when they reach the ground?
The marble that rolled down the ramp is moving faster than the marble that fell.
The marble that fell down the back of the ramp is moving faster than the marble that rolled.
The marble that rolled down the ramp is not moving when it reaches the ground.
The two marbles are moving with the same speed.
- 17. Multiple Choice
A block starts at rest at point P at the top of a ramp which is height h above the ground. The block slides down one side and up the other, stopping at a point less than h above the ground.
The block did not go as high on the other side because gravity pulls down.
The block did not go as high on the other side because potential energy always has to decrease.
The block did not go as high on the other side because work from friction made the mechanical energy less.
The situation as described is impossible to happen.
- 18. Multiple Choice
If there is no friction on this track, at which point would the coaster have the most kinetic energy?
A
B
C
D
- 19. Multiple Choice
A 40-kg person is climbing 3 m up a flight of stairs in 6 seconds. How much power did they exert climbing the stairs?
400 W
1200 W
200 W
120 W
- 20. Multiple Choice
What effect do external forces like an applied force, friction force, or drag force have?
They have no effect on a system's mechanical energy.
They convert kinetic energy into potential energy.
They convert potential energy into kinetic energy.
They convert between mechanical energy and other forms of energy to change the total mechanical energy of the system.
- 21. Multiple Choice
How does conservation of energy explain why something that is falling should speed up?
It gains kinetic energy because it gains potential energy.
It loses kinetic energy because no work was done on it.
It gains kinetic energy because it loses potential energy.
It loses kinetic energy because the Earth gains potential energy.
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