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- 1. Multiple ChoiceTrue or false
You do work only when you exert a force on an object and move ittruefalse - 2. Multiple ChoiceTwo factors that determine work aresize of the force, and distancesize of the force, and type of forcemass, and distance
- 3. Multiple Choiceunits for work arenetwonsjoulesmetersseconds
- 4. Multiple Choiceif you push a cart with a force of 60 N for 2 m... how much work have you done120 J30 J120 N30 N
- 5. Multiple Choicework transferssweatenergyvelocityeffort
- 6. Multiple Choice45J of work were done on the object that moved 5M. How much force was applied to the object?8N225N9N0N
- 7. Multiple ChoiceWhich of the following does a simple machine do?allows the users to apply less force over a longer distancereduce the amount of force needed to do workchange the direction of the applied forceall of the above
- 8. Multiple ChoiceWhy is no machine 100% efficient?some of the input energy is converted to mechanical energy in the environmentsome of the input energy is converted to chemical energy in the environmentsome of the input energy is converted to heat energy in the environmentAll machines can be 100% efficient
- 9. Multiple Choice
Energy is the ability to cause what?
Changes
Upheaval
Movement
Uncertainty
- 10. Multiple Choice
What kind of energy is in a rock at the edge of a cliff?PotentialKinetic - 11. Multiple ChoiceWhat kind of energy is in a moving skateboard?PotentialKinetic
- 12. Multiple Choice
What is a device that makes work easier?
Machine
Device
Computer
Wheelchair
- 13. Multiple Choice
The sum of GPE and KE in a system is also called what?
Net Energy
Gross Energy
5 Hour Energy
Mechanical Energy
- 14. Multiple Choice
When you are on a swing your potential energy is greatest at the ______ point.
Highest
Lowest
There is no potential energy on a swing
Its the same at every point
- 15. Multiple Choice
What is the unit for Energy?
Kilograms
Newtons
Joules
Watts
- 16. Multiple Choice
GPE depends on gravitational acceleration and which other two things?
Mass and Velocity
Velocity and Height
Mass and Gravity
Mass and Height
- 17. Multiple Choice
What has the greatest impact on Kinetic Energy?
Height
Mass
Velocity
Gravitational Acceleration
- 18. Multiple Choice
If I have a very mean cat that is perched on top of my refrigerator, assuming it has a mass of 2 kg and a height of 2 meters, what is the cat's potential energy? (assume 10 m/s2 for grav. acc.)
4 Joules
4 Newtons
10 Newtons
40 Joules
- 19. Multiple Choice
If my 500 kg car is rolling down the hill at 10 m/s, how much Kinetic Energy must I overcome in order to stop it?
2.5 Joules
25,000 Joules
50 Joules
5,000 Joules
- 20. Multiple Choice
If I have a 10 kg bowling that is sitting on top of a shelf and has 200 J of GPE, how tall is the shelf?
20 meters
2 meters
2,000 meters
20,000 meters
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