- 1. the product of distance and the force in the direction an object moves
A) Power B) Energy C) Force D) Work
- 2. the SI unit of work, equal to 1 newton-meter
A) Meter (m) B) Newton (N) C) Watt (W) D) Joule (J)
- 3. the rate of doing work
A) Work B) Force C) Momentum D) Power
- 4. a common unit of power, equal to about 746 watts
A) Cockroachpower B) Hippopotamuspower C) Possumpower D) Horsepower
- 5. a device that changes a force
A) Mechanical Advantage B) Machine C) Power 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) Input distance C) Output distance D) Wheel and axle
- 8. the work done on a machine as the input force acts through the input distance
A) Work efficiency B) Work resistance C) Work input D) Work output
- 9. the force exerted by a machine
A) Output distance B) Output force C) Output energy D) Ouput work
- 10. the distance an output force acts through in a machine
A) Output distance B) Ouput Watt C) Input distance D) Wedge
- 11. the work done by a machine as the output force acts through the output distance
A) Power input B) Work input C) Power output D) Work output
- 12. the number of times that a machine increases an input force
A) Horsepower B) Lever C) Efficiency D) Mechanical Advantage
- 13. the ratio of the output force to the input force in a machine
A) Actual Efficiency B) Actual Mechanical Advantage C) Actual Work D) Actual Power
- 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) Wedge B) Wheel and Axle C) Lever D) Pulley
- 17. the fixed point a lever rotates around
A) Axle B) Wedge C) Pulley D) Fulcrum
- 18. the distance between the fulcrum in a lever and the input force
A) Fulcrum arm B) Input arm C) Pulley arm D) Ouput leg
- 19. the distance between the fulcrum in a lever and the output force
A) Ouput spine B) Ouput leg C) Ouput finger D) Output arm
- 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) Inclined plane D) Wheel and Axle
- 21. a slanted surface along which a force moves an object to a different elevation
A) Inclined Plane B) Screw C) Pulley D) Lever
- 22. a V-shaped object whose sides are two inclined planes sloped toward each other
A) Pulley B) Lever C) Wedge D) Wheel and Axle
- 23. an inclined plane wrapped around a cylinder
A) Hammer B) Knife C) Wrench D) Screw
- 24. a simple machine that consists of a rope that fits into a groove in a wheel
A) Pulley B) Lever C) Wheel and axle D) Inclined plane
- 25. a combination of two or more simple machines that operate together
A) Actual efficient machine B) Machine Extraordinaire C) Megamachine D) Compound 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) 9350 J B) 25 J C) 195 J D) 1.29 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) 11020 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) 5040 W C) 15120 W D) 210 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) 8400 J B) 7200 J C) 620 J D) 9680 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) 0.34 B) 2.9 C) 0.8 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) 77% B) 34% C) 31% D) 80%
|