- 1. the product of distance and the force in the direction an object moves
A) Energy B) Work C) Force D) Power
- 2. the SI unit of work, equal to 1 newton-meter
A) Watt (W) B) Joule (J) C) Meter (m) D) Newton (N)
- 3. the rate of doing work
A) Force B) Momentum C) Power D) Work
- 4. a common unit of power, equal to about 746 watts
A) Possumpower B) Hippopotamuspower C) Cockroachpower D) Horsepower
- 5. a device that changes a force
A) Power B) Input Force C) Mechanical Advantage D) Machine
- 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) Fulcrum C) Wheel and axle D) Output distance
- 8. the work done on a machine as the input force acts through the input distance
A) Work efficiency B) Work resistance C) Work output D) Work input
- 9. the force exerted by a machine
A) Ouput work B) Output force C) Output distance D) Output energy
- 10. the distance an output force acts through in a machine
A) Input distance B) Output distance C) Wedge D) Ouput Watt
- 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 Mechanical Advantage 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) Efficiency B) Inclined Plane C) Power output D) Momentum
- 16. a rigid bar that is free to move around a fixed point
A) Wheel and Axle B) Lever C) Pulley D) Wedge
- 17. the fixed point a lever rotates around
A) Wedge B) Axle C) Pulley D) Fulcrum
- 18. the distance between the fulcrum in a lever and the input force
A) Ouput leg B) Input arm C) Pulley arm D) Fulcrum arm
- 19. the distance between the fulcrum in a lever and the output force
A) Ouput spine B) Ouput leg C) Output arm D) Ouput finger
- 20. a simple machine that consists of two rigidly attached disks or cylinders, each one with a different radius
A) Inclined plane B) Wheel and Axle 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) Pulley D) Inclined Plane
- 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) Lever B) Inclined plane C) Wheel and axle D) Pulley
- 25. a combination of two or more simple machines that operate together
A) Megamachine B) Compound Machine C) Actual efficient machine D) Machine Extraordinaire
- 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) 9350 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) 40600 J B) 207 J C) 2900 J D) 11020 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) 10 J B) 9300 J C) 279000 J D) 240 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) 9680 J B) 8400 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) 2.9 B) 0.34 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) 34% B) 77% C) 80% D) 31%
|