- 1. the product of distance and the force in the direction an object moves
A) Work B) Energy C) Force D) Power
- 2. the SI unit of work, equal to 1 newton-meter
A) Meter (m) B) Watt (W) C) Joule (J) D) Newton (N)
- 3. the rate of doing work
A) Power B) Work C) Momentum D) Force
- 4. a common unit of power, equal to about 746 watts
A) Possumpower B) Horsepower C) Cockroachpower D) Hippopotamuspower
- 5. a device that changes a force
A) Machine B) Power C) Mechanical Advantage D) Input Force
- 6. the force exerted on a machine
A) Work input B) Input force C) Friction force D) Input arm
- 7. the distance through which the input force acts in a machine
A) Input distance B) Wheel and axle C) Output distance D) Fulcrum
- 8. the work done on a machine as the input force acts through the input distance
A) Work output B) Work resistance C) Work efficiency D) Work input
- 9. the force exerted by a machine
A) Output force B) Output distance C) Ouput work D) Output energy
- 10. the distance an output force acts through in a machine
A) Input distance B) Ouput Watt C) Wedge D) Output distance
- 11. the work done by a machine as the output force acts through the output distance
A) Power output B) Work output C) Power input D) Work input
- 12. the number of times that a machine increases an input force
A) Horsepower B) Mechanical Advantage C) Efficiency D) Lever
- 13. the ratio of the output force to the input force in a machine
A) Actual Work B) Actual Power C) Actual Mechanical Advantage D) Actual Efficiency
- 14. the mechanical advantage of a machine in the absence of friction
A) Ideal Input B) Ideal Mechanical Advantage C) Ideal Work D) Ideal Wedge
- 15. the percentage of the work input that becomes work output in a machine
A) Inclined Plane B) Momentum C) Power output D) Efficiency
- 16. a rigid bar that is free to move around a fixed point
A) Pulley B) Wedge C) Lever D) Wheel and Axle
- 17. the fixed point a lever rotates around
A) Axle B) Fulcrum C) Wedge D) Pulley
- 18. the distance between the fulcrum in a lever and the input force
A) Ouput leg B) Fulcrum arm C) Input arm D) Pulley arm
- 19. the distance between the fulcrum in a lever and the output force
A) Ouput finger B) Ouput leg C) Output arm D) Ouput spine
- 20. a simple machine that consists of two rigidly attached disks or cylinders, each one with a different radius
A) Lever and Wedge B) Pulley and Axle C) Wheel and Axle D) Inclined plane
- 21. a slanted surface along which a force moves an object to a different elevation
A) Lever B) Pulley C) Screw D) Inclined Plane
- 22. a V-shaped object whose sides are two inclined planes sloped toward each other
A) Wedge B) Lever C) Wheel and Axle D) Pulley
- 23. an inclined plane wrapped around a cylinder
A) Knife B) Hammer C) Wrench D) Screw
- 24. a simple machine that consists of a rope that fits into a groove in a wheel
A) Wheel and axle B) Inclined plane C) Pulley D) Lever
- 25. a combination of two or more simple machines that operate together
A) Machine Extraordinaire B) Actual efficient machine C) Compound Machine D) Megamachine
- 26. David pushes a cart of pumkins 85 m down the aisle in walmart. He uses a force of 110 N. How much work does he do?
A) 195 J B) 1.29 J C) 25 J D) 9350 J
- 27. Miranda weighs 580 Newtons. She runs up a flight of stairs that rise 5 meters. It takes her 14 seconds. How much work does she do?
A) 11020 J B) 40600 J C) 207 J D) 2900 J
- 28. Alex weighs 720 Newtons. He runs up a flight of stairs that rise 7 meters. It takes him 24 seconds. What is his power?
A) 1440 W B) 15120 W C) 210 W D) 5040 W
- 29. An inclined plane is 30 meters long and rises 8 meters. Sierra uses a force of 310 N to push a box that weighs 900 N up the plane. Find the work input.
A) 240 J B) 10 J C) 9300 J D) 279000 J
- 30. An inclined plane is 30 meters long and rises 8 meters. Sierra uses a force of 310 N to push a box that weighs 900 N up the plane. Find the work output.
A) 7200 J B) 8400 J C) 9680 J D) 620 J
- 31. An inclined plane is 30 meters long and rises 8 meters. Sierra uses a force of 310 N to push a box that weighs 900 N up the plane. Find the mechanical advantage.
A) 0.8 B) 0.34 C) 1.25 D) 2.9
- 32. An inclined plane is 30 meters long and rises 8 meters. Sierra uses a force of 310 N to push a box that weighs 900 N up the plane. Find the efficiency
A) 34% B) 80% C) 31% D) 77%
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