# Chapter 12 Review 3: Question Preview (ID: 596)

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What is the momentum of a 60 kg ice skater gliding across the ice at a speed of 2 m/s |
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a) 60 kg | b) 240 kgxm/s | c) 30 kg/ m/s | d) 120 kgxm/s | |

The gravitational force between two objects increases as mass |
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a) decreases or distance decreases | b) decreases or distance increases | c) increases or distance decreases | d) increases or distance increases | |

The mass of a newborn baby is 3.9 kg. What is the baby's weight? |
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a) 38.2 N | b) 23 N | c) 3.9 N | d) 9.8 N | |

A 36 kg canoe broke free of its dock and is now floating downriver at a speed of 2.9 m/s. What is the canoe's momentum? |
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a) 9.8 kgxm/s | b) 145 kgxm/s | c) 104.4 kgxm/s | d) 38.2 kgxm/s | |

What happens to the magnitude of the fluid friction acting on a submarine as the submarine's speed increases? |
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a) It decreases | b) It Increases | c) It does not change | d) Not enough information to tell | |

Why don't action-reaction forces cancel each other out |
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a) the action force is larger | b) the reaction force is larger | c) Act on different objects | d) they do cancel each other out | |

What law states that if no net force acts on a system, then the total momentum of the system does not change? |
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a) Newton's first law | b) Newton's second law | c) Newton's third law | d) The law of conservation of momentum | |

If three balls are released at the same time from the same height, which one will hit the ground first? |
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a) Ball 1 | b) Ball 2 | c) Ball 3 | d) The will each hit at the same time | |

How are the size and direction of action-reaction forces related? |
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a) Equal in size, equal in direction | b) Opposite in size, equal in direction | c) Equal in size, opposite in direction | d) Opposite in size, Opposite in direction | |

How can you double the acceleration of an object if you cannot alter the object's mass? |
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a) Double the mass | b) Double the force | c) Cut the mass in half | d) Cut the force in half | |

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