# Motion And Force: Question Preview (ID: 1299)

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If Kim won a 400-m race in 80 s, her rate of speed was |
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a) 10 m/s | b) 5 m/s | c) 2 m/s | d) 20 m/s | |

A person in a head-on car collision, who is not wearing a seat belt, continues to move forward at the same speed of the car because of |
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a) inertia | b) weight | c) friction | d) gravity | |

NewtonвЂ™s first law of motion states that an object at rest stays at rest unless a _____ acts on it. |
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a) balanced force | b) strong force | c) weak force | d) net force | |

The amount of gravitational force between objects depends on their |
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a) frictional forces | b) inertia | c) speed and direction | d) masses and the distance between them | |

The relationship among mass, force, and acceleration is explained by |
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a) Newton's 1st Law of Motion | b) Newton's 2nd Law of Motion | c) Newton's 3rd Law of Motion | d) the law of conservation of momentum | |

Acceleration due to gravity is |
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a) 9.8 meters per second | b) 98 meters per second squared | c) 9.8 meters per second squared | d) 98 meters per second | |

In the absence of air, a penny and a feather that are dropped from the same height will |
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a) fall at different rates | b) float | c) fall at the same rates | d) not have momentum | |

What is the force of an object that has a mass of 10 kg and an acceleration of 2 m/s2? |
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a) 2 N | b) 5 N | c) 20 N | d) 50 N | |

What is the rate of change of speed and/or direction? |
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a) acceleration | b) gravity | c) net force | d) inertia | |

What is the momentum of an object that has a mass of 10 kg and a velocity of 25 m/s? |
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a) 2.5 kg x m/s | b) 250 kg x m/s | c) 2500 kg x m/s | d) 25 kg x m/s | |

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