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- 1. Multiple Choice
An object of 2.03 kg is thrown vertically upwards at an initial speed of 10.41 m/s. What is the kinetic energy at the moment it is thrown?
110 J
1200 J
2.03 J
10.41 J
- 2. Multiple Choice
An object of mass 0.328 kg moves along a straight path at a constant velocity. If the kinetic energy is 14.7 J, determine the speed of the object.
12.34 m/s
0 m/s
9.47 m/s
5.16 m/s
- 3. Multiple Choice
A 0.050 kg stone is dropped from a height of 15.67 m. What is the potential energy at the instant of release?
3.44 J
0 J
5.98 J
7.68 J
- 4. Multiple Choice
A 4.3 kg box on a platform has a potential energy of 349 J. Determine the height of the platform.
0 m
8.27 m
9.81 m
2.43 m
- 5. Multiple Choice
An object held at a height of 3.7 m has a potential energy of 209 J. What is the mass of the object?
5.76 kg
8.97 kg
4.32 kg
11.98 kg
- 6. Multiple ChoiceHow much work is being done with 200 N of force over 426 meters?85,200 J45,620 J90,480 J62,329 J
- 7. Multiple ChoiceIf 150 Joules of work is needed to move a box 10 meters, what force was used?1500 N15 N1.5 N150 N
- 8. Multiple Choice
Which of the following is the best example of work being done.
doing homework
lifting a box
pushing a stationary box
holding a box
- 9. Multiple Choice__________ is stored energy.PotentialKineticNone of the aboveAll of the above
- 10. Multiple ChoiceEnergy due to motion is ____________ energy.PotentialEnergyKineticFriction
- 11. Multiple Choice
The Law of Conservation of Energy states:
An object at rest tends to stay at rest, and an object in motion tends to stay in motion unless acted upon by an outside force.
Energy can neither be created or destroyed, but it can change form.
For every action there is an equal and opposite reaction.
The force acting upon an object is equal to its mass times its acceleration; the greater the mass of an object, the more force is required to move it.
- 12. Multiple Choice
It is the rate at which work was done. The standard metric unit of it is the Watt
time
displacement
power
force
- 13. Multiple Choice
This equation represents potential energy
Vf=V0+at
mgh
0.5 m v2
0.5 k x2
- 14. Multiple Choice
This equation represent kinetic energy
Vf=V0+at
mgh
(1/2) m v2
(1/2) k x2
- 15. Multiple ChoiceHow much work is being done with 200 N of force over 426 meters?85,200 J45,620 J90,480 J62,329 J
- 16. Multiple Choice
The SI unit of work
Joules
Watts
Newtons
meters
- 17. Multiple Choice
The SI unit for power
Watts
Joules
Newtons
Meters
- 18. Multiple Choice
Gravitational potential energy depends on the ________ and ________ of the object.
Height and mass
Spring constant and Distance away from equilibrium
Mass and Velocity
Height and Friction
- 19. Multiple Choice
A student with a mass of 62.0 kg walks up a flight of stairs with a height of 3.40 meters. If it takes him 7.00 seconds to get to the top, how much power did he generate?
295 W
2070 W
86.8 W
295.12 W
- 20. Multiple Choice
John and Bob weigh the same and both run up a flight of stairs. John reaches the top in 8 seconds while Bob follows in 10 seconds. Who has exhibited more power ?
John
Bob
they both have the same amount of power
not enough info is given to determine who has more power
- 21. Multiple Choice
A student needs 10 Newtons of force to lift a box to the top of a 2 meter shelf. How much work do they do?
12 J
8 J
20 J
5 J
- Answer choicesTagsAnswer choicesTags