# Force, Work, And Power: Question Preview (ID: 12640)

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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) a lot | c) a little | d) The exact amount of work and the weight of the object must be known to figure this out. | |

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

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

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 a box across the floor | c) a metal bar bracing a leaning brick wall | d) an air bag deploying in an automobile wrech | |

Two weight lifters (Herb and Foley) wonder which one is doing the most work. Which statement is true? |
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a) Herb lifting 60 kg 1 meter does more work than Foley lifting 35 kg 2 meters. | b) Herb lifting 50 kg 1.5 meters does more work than Foley lifting 55 kg 1 meter. | c) Herb lifting 70 kg 0.5 meters does more work than Foley lifting 30 kg 1.5 meter. | d) Herb lifting 80 kg 2 meters does more work than Foley lifting 25 kg 1 meter 7 times. | |

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

A sailboat weighing 1,960 N moves at 3m/s for 10 minutes. What is the value for the work of the sails. |
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a) 19,600 J | b) 58,800 J | c) 1,176,000 J | d) 3,528,000 J | |

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) 0.5 J | b) 19.6 J | c) 1.225 J | d) 192.08 | |

A rod on a compressed spring exerts 12 N of force on a 0.05-kg steel ball. The rod pushes the ball 0.03 m. How much work does the spring do on the ball? |
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a) 0.36 J | b) 0.36 N | c) 0.60 N | d) 1.00 J | |

A 100 N force is applied to a plow by the horse pulling the plow. How much work does it take for the horse 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 | |

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