- 1. the product of distance and the force in the direction an object moves
A) Work B) Power C) Energy D) Force
- 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) Momentum B) Force C) Power D) Work
- 4. a common unit of power, equal to about 746 watts
A) Horsepower B) Cockroachpower C) Possumpower D) Hippopotamuspower
- 5. a device that changes a force
A) Mechanical Advantage B) Machine C) Input Force D) Power
- 6. the force exerted on a machine
A) Input force B) Work input C) Friction force D) Input arm
- 7. the distance through which the input force acts in a machine
A) Output distance B) Input distance C) Fulcrum D) Wheel and axle
- 8. the work done on a machine as the input force acts through the input distance
A) Work resistance B) Work input C) Work output D) Work efficiency
- 9. the force exerted by a machine
A) Ouput work B) Output energy C) Output force D) Output distance
- 10. the distance an output force acts through in a machine
A) Wedge B) Ouput Watt C) Output distance D) Input distance
- 11. the work done by a machine as the output force acts through the output distance
A) Power output B) Power input C) Work output D) Work input
- 12. the number of times that a machine increases an input force
A) Efficiency B) Lever C) Mechanical Advantage D) Horsepower
- 13. the ratio of the output force to the input force in a machine
A) Actual Mechanical Advantage B) Actual Power C) Actual Work D) Actual Efficiency
- 14. the mechanical advantage of a machine in the absence of friction
A) Ideal Mechanical Advantage B) Ideal Work C) Ideal Input D) Ideal Wedge
- 15. the percentage of the work input that becomes work output in a machine
A) Inclined Plane B) Power output C) Efficiency D) Momentum
- 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) Ouput leg C) Pulley arm D) Input 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) Wheel and Axle B) Inclined plane C) Pulley and Axle D) Lever and Wedge
- 21. a slanted surface along which a force moves an object to a different elevation
A) Lever B) Screw C) Inclined Plane 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) 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) Wheel and axle B) Lever C) Inclined plane D) Pulley
- 25. a combination of two or more simple machines that operate together
A) Machine Extraordinaire B) Megamachine C) Compound Machine 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) 25 J C) 195 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) 2900 J B) 11020 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) 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) 10 J B) 9300 J C) 240 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) 1.25 B) 2.9 C) 0.34 D) 0.8
- 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) 77% C) 80% D) 34%
|