- 1. the product of distance and the force in the direction an object moves
A) Force
B) Power
C) Work
D) Energy
- 2. the SI unit of work, equal to 1 newton-meter
A) Meter (m)
B) Joule (J)
C) Newton (N)
D) Watt (W)
- 3. the rate of doing work
A) Force
B) Momentum
C) Work
D) Power
- 4. a common unit of power, equal to about 746 watts
A) Cockroachpower
B) Horsepower
C) Hippopotamuspower
D) Possumpower
- 5. a device that changes a force
A) Machine
B) Input Force
C) Power
D) Mechanical Advantage
- 6. the force exerted on a machine
A) Work input
B) Friction force
C) Input arm
D) Input force
- 7. the distance through which the input force acts in a machine
A) Fulcrum
B) Input distance
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 output
B) Work efficiency
C) Work resistance
D) Work input
- 9. the force exerted by a machine
A) Output force
B) Ouput work
C) Output distance
D) Output energy
- 10. the distance an output force acts through in a machine
A) Output distance
B) Input distance
C) Ouput Watt
D) Wedge
- 11. the work done by a machine as the output force acts through the output distance
A) Power input
B) Power output
C) Work input
D) Work output
- 12. the number of times that a machine increases an input force
A) Efficiency
B) Lever
C) Horsepower
D) Mechanical Advantage
- 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 Mechanical Advantage
C) Ideal Wedge
D) Ideal Work
- 15. the percentage of the work input that becomes work output in a machine
A) Momentum
B) Efficiency
C) Inclined Plane
D) Power output
- 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) Wedge
B) Axle
C) Fulcrum
D) Pulley
- 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) Output arm
B) Ouput spine
C) Ouput finger
D) Ouput leg
- 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) Screw
B) Inclined Plane
C) Pulley
D) Lever
- 22. a V-shaped object whose sides are two inclined planes sloped toward each other
A) Wheel and Axle
B) Pulley
C) Lever
D) Wedge
- 23. an inclined plane wrapped around a cylinder
A) Hammer
B) Knife
C) Screw
D) Wrench
- 24. a simple machine that consists of a rope that fits into a groove in a wheel
A) Inclined plane
B) Pulley
C) Wheel and axle
D) Lever
- 25. a combination of two or more simple machines that operate together
A) Compound Machine
B) Megamachine
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) 9350 J
B) 195 J
C) 1.29 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) 11020 J
C) 2900 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) 1440 W
C) 210 W
D) 15120 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) 240 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) 9680 J
B) 7200 J
C) 620 J
D) 8400 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) 0.34
C) 2.9
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) 34%
C) 77%
D) 80%
|