- 1. the product of distance and the force in the direction an object moves
A) Energy B) Power C) Force D) Work
- 2. the SI unit of work, equal to 1 newton-meter
A) Joule (J) B) Meter (m) C) Watt (W) D) Newton (N)
- 3. the rate of doing work
A) Work B) Momentum C) Force D) Power
- 4. a common unit of power, equal to about 746 watts
A) Hippopotamuspower B) Possumpower C) Horsepower D) Cockroachpower
- 5. a device that changes a force
A) Machine B) Power C) Input Force D) Mechanical Advantage
- 6. the force exerted on a machine
A) Work input B) Friction force C) Input force D) Input arm
- 7. the distance through which the input force acts in a machine
A) Fulcrum B) Output distance C) Input distance D) Wheel and axle
- 8. the work done on a machine as the input force acts through the input distance
A) Work output B) Work efficiency C) Work resistance D) Work input
- 9. the force exerted by a machine
A) Output distance B) Ouput work C) Output energy D) Output force
- 10. the distance an output force acts through in a machine
A) Ouput Watt B) Output distance C) Input distance D) Wedge
- 11. the work done by a machine as the output force acts through the output distance
A) Work input B) Power input C) Power output D) Work output
- 12. the number of times that a machine increases an input force
A) Efficiency B) Mechanical Advantage C) Horsepower D) Lever
- 13. the ratio of the output force to the input force in a machine
A) Actual Mechanical Advantage B) Actual Efficiency C) Actual Work D) Actual Power
- 14. the mechanical advantage of a machine in the absence of friction
A) Ideal Work B) Ideal Mechanical Advantage C) Ideal Wedge D) Ideal Input
- 15. the percentage of the work input that becomes work output in a machine
A) Momentum B) Inclined Plane C) Efficiency D) Power output
- 16. a rigid bar that is free to move around a fixed point
A) Wheel and Axle B) Pulley C) Lever D) Wedge
- 17. the fixed point a lever rotates around
A) Wedge B) Axle C) Fulcrum D) Pulley
- 18. the distance between the fulcrum in a lever and the input force
A) Fulcrum arm B) Pulley arm C) Ouput leg D) Input arm
- 19. the distance between the fulcrum in a lever and the output force
A) Ouput spine B) Output arm C) Ouput finger D) Ouput leg
- 20. a simple machine that consists of two rigidly attached disks or cylinders, each one with a different radius
A) Inclined plane B) Pulley and Axle C) Lever and Wedge D) Wheel and Axle
- 21. a slanted surface along which a force moves an object to a different elevation
A) Screw B) Inclined Plane C) Lever D) Pulley
- 22. a V-shaped object whose sides are two inclined planes sloped toward each other
A) Pulley B) Wedge C) Wheel and Axle D) Lever
- 23. an inclined plane wrapped around a cylinder
A) Knife B) Screw C) Hammer D) Wrench
- 24. a simple machine that consists of a rope that fits into a groove in a wheel
A) Pulley B) Lever C) Inclined plane D) Wheel and axle
- 25. a combination of two or more simple machines that operate together
A) Actual efficient machine B) Machine Extraordinaire 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) 9350 J B) 1.29 J C) 195 J D) 25 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) 2900 J C) 207 J D) 40600 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) 15120 W B) 210 W C) 5040 W D) 1440 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) 279000 J B) 10 J C) 240 J D) 9300 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) 620 J B) 9680 J C) 8400 J D) 7200 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) 2.9 C) 0.34 D) 1.25
- 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) 31% B) 34% C) 77% D) 80%
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