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PS CH 14 Voc S1 & S2 (12)
供稿人: Conway
  • 1. the product of distance and the force in the direction an object moves
A) Force
B) Work
C) Energy
D) Power
  • 2. the SI unit of work, equal to 1 newton-meter
A) Watt (W)
B) Meter (m)
C) Joule (J)
D) Newton (N)
  • 3. the SI units of power, equal to 1 Joule per second
A) Newton (N)
B) Joule (J)
C) Wattt (W)
D) Kilogram (kg)
  • 4. the rate of doing work
A) Force
B) Work
C) Power
D) Momentum
  • 5. a common unit of power, equal to about 746 watts
A) Cockroachpower
B) Horsepower
C) Hippopotamuspower
D) Possumpower
  • 6. a device that changes a force
A) Input Force
B) Power
C) Mechanical Advantage
D) Machine
  • 7. the force exerted on a machine
A) Work input
B) Friction force
C) Input arm
D) Input force
  • 8. the distance through which the input force acts in a machine
A) Fulcrum
B) Input distance
C) Output distance
D) Wheel and axle
  • 9. 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
  • 10. the force exerted by a machine
A) Output energy
B) Ouput work
C) Output force
D) Output distance
  • 11. the distance an output force acts through in a machine
A) Output distance
B) Ouput Watt
C) Input distance
D) Wedge
  • 12. the work done by a machine as the output force acts through the output distance
A) Work input
B) Power output
C) Power input
D) Work output
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