# Unit 8: Question Preview (ID: 13869)

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In mechanical systems, a large reduction in momentum is accomplished without damage to the machinery by |
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a) applying a large stopping force for a short time | b) reducing the momentum to zero in the shortest amount of time | c) reducing the momentum to zero in the longest possible time | d) slowing down the machinery in the shortest amount of time | |

The law of conservation of momentum tells us that in an isolated system: |
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a) the total momentum before an interaction equals the total momentum after the interaction | b) the velocity before an interaction equals the velocity after the interaction | c) the kinetic energy before an interaction equals the kinetic energy after the interaction | d) the total momentum before an interaction is greater than the total momentum after the interaction | |

An object's momentum tells us mostly about |
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a) the potential energy the object has | b) the amount of motion the object has | c) the physical size of the object | d) the specific gravity of the object | |

What are the metric units for momentum? |
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a) kgm/sec | b) slug ft/ sec | c) kg/m sec | d) kg m sec | |

L mom = |
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a) I + w | b) m times I | c) I times w | d) mr^2 | |

The linear impulse of a 10 lb force acting on an object for 5 seconds is what |
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a) 2 lb sec | b) 50 lb sec | c) 0.5 lb sec | d) 0 lb sec | |

Which of the following will give you the full and correct information about a rotating object's angular momentum |
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a) mass and angular velocity | b) mass and radius | c) moment of inertia and angular velocity | d) linear momentum and specific gravity | |

When a golf ball is hit, the linear impulse involved is the product of the force applied by the club to the ball and |
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a) the distance the ball moves | b) the time the club is in contact with the ball | c) the mass of the golf ball | d) the mass of the golf club | |

Momentum is what kind of quantity |
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a) scalar | b) vector | c) both | d) neither | |

A linear force applied to an object for a period of time is called |
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a) linear momentum | b) linear impulse | c) angular momentum | d) angular impulse | |

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