- 1. the product of distance and the force in the direction an object moves
A) Force B) Work C) Energy D) Power
- 2. the SI unit of work, equal to 1 newton-meter
A) Watt (W) B) Newton (N) C) Meter (m) D) Joule (J)
- 3. the rate of doing work
A) Force B) Power C) Momentum D) Work
- 4. a common unit of power, equal to about 746 watts
A) Cockroachpower B) Hippopotamuspower C) Horsepower D) Possumpower
- 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) Input arm B) Input force C) Work input D) Friction force
- 7. the distance through which the input force acts in a machine
A) Fulcrum B) Wheel and axle C) Output distance D) Input distance
- 8. the work done on a machine as the input force acts through the input distance
A) Work output B) Work input C) Work resistance D) Work efficiency
- 9. the force exerted by a machine
A) Output energy B) Ouput work C) Output force D) Output distance
- 10. the distance an output force acts through in a machine
A) Input distance B) Output distance C) Ouput Watt D) Wedge
- 11. the work done by a machine as the output force acts through the output distance
A) Power output B) Work output C) Work input D) Power input
- 12. the number of times that a machine increases an input force
A) Horsepower B) Mechanical Advantage C) Lever D) Efficiency
- 13. the ratio of the output force to the input force in a machine
A) Actual Efficiency B) Actual Work C) Actual Power D) Actual Mechanical Advantage
- 14. the mechanical advantage of a machine in the absence of friction
A) Ideal Work B) Ideal Input C) Ideal Wedge D) Ideal Mechanical Advantage
- 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) Wheel and Axle C) Wedge D) Lever
- 17. the fixed point a lever rotates around
A) Fulcrum B) Axle C) Pulley D) Wedge
- 18. the distance between the fulcrum in a lever and the input force
A) Ouput leg B) Fulcrum arm C) Pulley arm D) Input arm
- 19. the distance between the fulcrum in a lever and the output force
A) Output arm B) Ouput leg C) Ouput finger D) Ouput spine
- 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) Inclined Plane B) Pulley C) Screw D) Lever
- 22. a V-shaped object whose sides are two inclined planes sloped toward each other
A) Wheel and Axle B) Wedge C) Pulley D) Lever
- 23. an inclined plane wrapped around a cylinder
A) Wrench B) Knife C) Hammer D) Screw
- 24. a simple machine that consists of a rope that fits into a groove in a wheel
A) Inclined plane B) Wheel and axle C) Pulley D) Lever
- 25. a combination of two or more simple machines that operate together
A) Machine Extraordinaire B) Compound Machine C) Megamachine D) Actual efficient machine
- 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) 1.29 J B) 195 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) 40600 J B) 2900 J C) 11020 J D) 207 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) 5040 W B) 15120 W C) 210 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) 240 J C) 10 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) 8400 J B) 9680 J C) 7200 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) 31% B) 34% C) 80% D) 77%
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