- 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) Meter (m)
B) Newton (N)
C) Watt (W)
D) Joule (J)
- 3. the rate of doing work
A) Power
B) Force
C) Work
D) Momentum
- 4. a common unit of power, equal to about 746 watts
A) Hippopotamuspower
B) Horsepower
C) Cockroachpower
D) Possumpower
- 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) Work input
B) Friction force
C) Input force
D) Input arm
- 7. the distance through which the input force acts in a machine
A) Output distance
B) Fulcrum
C) Wheel and axle
D) Input distance
- 8. the work done on a machine as the input force acts through the input distance
A) Work resistance
B) Work output
C) Work efficiency
D) Work input
- 9. the force exerted by a machine
A) Output force
B) Output distance
C) Output energy
D) Ouput work
- 10. the distance an output force acts through in a machine
A) Ouput Watt
B) Wedge
C) Input distance
D) Output distance
- 11. the work done by a machine as the output force acts through the output distance
A) Work output
B) Power output
C) Power input
D) Work input
- 12. the number of times that a machine increases an input force
A) Mechanical Advantage
B) Lever
C) Horsepower
D) Efficiency
- 13. the ratio of the output force to the input force in a machine
A) Actual Mechanical Advantage
B) Actual Efficiency
C) Actual Power
D) Actual Work
- 14. the mechanical advantage of a machine in the absence of friction
A) Ideal Wedge
B) Ideal Mechanical Advantage
C) Ideal Work
D) Ideal Input
- 15. the percentage of the work input that becomes work output in a machine
A) Inclined Plane
B) Efficiency
C) Power output
D) Momentum
- 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) Axle
B) Pulley
C) Wedge
D) Fulcrum
- 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) Output arm
B) Ouput finger
C) Ouput spine
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) Lever
B) Inclined Plane
C) Screw
D) Pulley
- 22. a V-shaped object whose sides are two inclined planes sloped toward each other
A) Lever
B) Pulley
C) Wedge
D) Wheel and Axle
- 23. an inclined plane wrapped around a cylinder
A) Knife
B) Screw
C) Wrench
D) Hammer
- 24. a simple machine that consists of a rope that fits into a groove in a wheel
A) Pulley
B) Wheel and axle
C) Lever
D) Inclined plane
- 25. a combination of two or more simple machines that operate together
A) Actual efficient machine
B) Machine Extraordinaire
C) Compound Machine
D) Megamachine
- 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) 9350 J
C) 25 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) 207 J
B) 11020 J
C) 2900 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) 210 W
B) 1440 W
C) 15120 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) 9300 J
B) 279000 J
C) 10 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) 620 J
B) 8400 J
C) 7200 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) 0.8
C) 1.25
D) 2.9
- 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) 80%
D) 31%
|