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Physics, Science
9th
grade
Work, Power, and Energy (Physical Science)
22 questions
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- 1. Multiple Choice
In order for work to be done on object, which of the following statements must be true? Check all that apply.
A force must be acting on an object
The object must remain still
The object must be lifted off the ground
The object must move
- 2. Multiple Choice
Which of the following quantities are measured in joules (J)? Check all that apply.
Power
Work
Energy
Momentum
- 3. Multiple Choice
When an object stores energy as a result of its position, it has:
Kinetic Energy
Power
Work
Potential Energy
- 4. Multiple Choice
The energy an object has as a result of its motion.
Kinetic Energy
Power
Work
Potential Energy
- 5. Multiple Choice
Assuming there are no outside forces, the total mechanical energy of the rollercoaster will:
Remain constant
Change depending on the height of the rollercoaster
Change depending on the speed of the rollercoaster
More than one of the above
- 6. Multiple Choice
You climb stairs as part of a new workout routine. If you wanted to increase the work you do during your workout, you could: (Check all that apply)
Run up the stairs faster
Hold something heavy while you do it
Go up more stairs
Hop up the stairs instead of running
- 7. Multiple Choice
Of the following, which would NOT be considered work?
An Olympic lifter lifting the bar from the ground to their chest
The lifter taking the bar from their chest to above their head
Holding the bar above their head with their arms fully extended
Dropping the bar and letting it fall to the ground
- 8. Multiple Choice
Energy can be defined as the ability to:
Do work
Apply a force
Have power
Sleep
- 9. Multiple Choice
Which of the following is NOT a fossil fuel?
Coal
Uranium
Oil
Natural Gas
- 10. Multiple Choice
Which of the following statements are true according to the law of conservation of energy?
Energy cannot be created
Energy cannot be destroyed
Energy can be converted from one form to another
All of the above
- 11. Multiple Choice
Work is the transfer of...
Energy
Force
Mass
Motion
- 12. Fill in the Blank
If it takes 7.5 J of work to move a box 0.75 m, how much force did you exert? Be sure to include a unit with your answer!
- 13. Fill in the Blank
A worker uses a cart to move a load of bricks that weighs 680 N a distance of 15 m across a parking lot. What amount of work does the worker perform? Be sure to include a unit with your answer!
- 14. Fill in the Blank
A cake mixer is capable of doing 500 J of work over the course of 2.5 seconds. What is the power output of the cake mixer? Be sure to include a unit with your answer!
- 15. Multiple Choice
Which has more energy?
A 100 kg rock moving down a hill at 5 m/s.
A 10 kg cannonball moving 15 m/s after being launched
- 16. Multiple Choice
Which has more energy?
A 1 kg book that is 5 m high
A 1 kg book that is traveling 5 m/s
- 17. Fill in the Blank
Based on the information provided in the picture, what is the Kinetic Energy at point B?
- 18. Multiple Choice
Work or not? - Lifting a heavy box off the ground.
Work
Not Work
- 19. Multiple Choice
Work or not? - Carrying a box to your car.
Work
Not Work
- 20. Multiple Choice
Work or not? - Your phone slipping out of your hand and falling to the ground.
Work
Not Work
- 21. Multiple Choice
Work or not? - You drive a new couch to your house after picking it up from the store.
Work
Not Work
- 22. Multiple Choice
Work or not? - You throw a ball to your dad while playing catch.
Work
Not Work
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