- 1. the product of distance and the force in the direction an object moves
A) Power B) Force C) Energy D) Work
- 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) Work B) Force C) Momentum D) Power
- 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) Machine B) Power C) Input Force D) Mechanical Advantage
- 6. the force exerted on a machine
A) Friction force B) Work input C) Input force D) Input arm
- 7. the distance through which the input force acts in a machine
A) Wheel and axle B) Output distance C) Fulcrum D) Input distance
- 8. the work done on a machine as the input force acts through the input distance
A) Work input B) Work efficiency C) Work output D) Work resistance
- 9. the force exerted by a machine
A) Output distance B) Ouput work C) Output force D) Output energy
- 10. the distance an output force acts through in a machine
A) Output distance B) Wedge C) Ouput Watt D) Input distance
- 11. the work done by a machine as the output force acts through the output distance
A) Power output B) Work output C) Power input D) Work 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 Power B) Actual Efficiency C) Actual Mechanical Advantage D) Actual Work
- 14. the mechanical advantage of a machine in the absence of friction
A) Ideal Input B) Ideal Wedge C) Ideal Mechanical Advantage D) Ideal Work
- 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) Pulley D) Lever
- 17. the fixed point a lever rotates around
A) Fulcrum B) Axle C) Wedge D) Pulley
- 18. the distance between the fulcrum in a lever and the input force
A) Fulcrum arm B) Input arm C) Ouput leg D) Pulley arm
- 19. the distance between the fulcrum in a lever and the output force
A) Output arm B) Ouput leg C) Ouput spine 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) Pulley and Axle C) Wheel and Axle D) Lever and Wedge
- 21. a slanted surface along which a force moves an object to a different elevation
A) Pulley B) Lever C) Screw D) Inclined Plane
- 22. a V-shaped object whose sides are two inclined planes sloped toward each other
A) Pulley B) Wheel and Axle C) Wedge D) Lever
- 23. an inclined plane wrapped around a cylinder
A) Screw B) Knife 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) 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) 195 J B) 25 J C) 9350 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) 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) 15120 W B) 5040 W C) 1440 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) 9300 J B) 279000 J C) 240 J D) 10 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) 8400 J C) 9680 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) 2.9 B) 0.8 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) 77% B) 31% C) 34% D) 80%
|