# Work And Power: Question Preview (ID: 8763)

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Work occurs when |
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a) something moves | b) something moves in the direction of the force | c) something moves against the direction of the force | d) something stays still | |

Which of the following does NOT demonstrates work? |
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a) Carrying a backpack to class | b) Lifting your books off a desk | c) Pushing a cart through a store | d) Pulling a suitcase through the airport | |

What is the formula used to calculate work? |
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a) distance divided by time | b) joules multiplied by watts | c) force multiplied by distance | d) force added to force | |

The newton-meter is the unit used to describe force. What is its synonym? |
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a) watt | b) newton | c) joule | d) power | |

Cmdr. Data used 2 N of force to lift his cat, Spot, 1.5 meters from the floor to his sofa. How much work did he do? |
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a) 3 joules | b) .75 joules | c) 30 joules | d) No joules because no work was actually being completed. | |

The rate at which work is done is known as |
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a) time | b) power | c) joules | d) newton-meters | |

The formula for power is |
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a) force multiplied by distance | b) time divided by work | c) joules multiplied by time | d) work divided by time | |

Power is measured by joules per second. What is a synonym for this measurement? |
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a) joule | b) ampere | c) watt | d) meter/second | |

How much power is used if it takes Lt. Cmdr. Worf 10 seconds to complete 35 joules of work? |
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a) 350 watts | b) 45 watts | c) 25 watts | d) 3.5 watts | |

Kirk and Spock race to move identical boxes the same distance. Spock finishes first. How can this happen? |
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a) Spock is a Vulcan, and he tricked Kirk. | b) Kirk used less time than Spock. | c) Spock used more power than Kirk. | d) Kirk has more power than Spock. | |

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