# Work And Power: Question Preview (ID: 8178)

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How much work is done when a very large force is applied to an object but does not move the object? |
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a) none | b) The exact amount of work and weight of the object must be known to figure this out. | c) a little | d) a lot | |

Which of these is the unit of measure for work? |
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a) watts | b) newtons | c) pounds | d) joules | |

What is the correct formula for work? |
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a) Work= force/time | b) Work= force/distance | c) Work= mass * acceleration | d) Work= force * distance | |

Which of the following is NOT an example of work? |
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a) a windmill turning in the wind | b) a person sliding on a box across the floor | c) a metal bar bracing a leaning brick wall | d) an air bag deploying in an automobile wreck | |

What is the work done on a 34-N weight if it's lifted up 1 km? |
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a) 17J | b) 34J | c) 0.034J | d) 34,000J | |

A model rocket weighing 4.9 N launches from a pad. How much work does the little rocket engine do in the first 4 meters? |
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a) 0.5J | b) 19.6J | c) 1.225J | d) 192.08J | |

A 100 N force is applied to a plow by the horse pulling the plow. How much work does it take for the force to pull the plow 100 meters in 5 minutes? |
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a) 10,000 J | b) 10,000 N | c) 250,000 N | d) 3,000,000 J | |

What is the unit of measurement for power? |
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a) m/s2 | b) watts | c) joules | d) newtons | |

What is the correct formula for power? |
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a) Power=work/time | b) Power= work*time | c) Power=force*distance | d) Power=work*distance | |

A model rocket weighing 4.9 N launches from a pad. How much work does the little rocket engine do in the first 4 meters? |
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a) 30 W | b) 100 W | c) 300 W | d) 900 W | |

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