# AP (Advanced Placement) Physics(B-C): Questions 384 - 387 of 921

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## Question number: 384

### Question

A car moving at a speed is brought to rest in time by a force . To stop the car in one half the time , what force is required?

### Choices

Choice (5) | Response | |
---|---|---|

a. | Force must be twice as large as . | |

b. | Force must be half as large as . | |

c. | The forces required to stop the car are the same in both situations. | |

d. | Force must be one fourth as large as . | |

e. | None of the above |

## Question number: 385

### Question

During an inelastic collision, kinetic energy of the system is lost, because kinetic energy

### Choices

Choice (5) | Response | |
---|---|---|

a. | Decreases whenever a force is applied to a system | |

b. | Is changed to other forms of energy | |

c. | Must decrease as momentum increases | |

d. | Cannot be conserved during any collision | |

e. | Question does not provide sufficient data or is vague |

## Passage

## Question number: 386 (1 of 2 Based on Passage) Show Passage

» Periodic Motion, Mechanical Waves & Sound

### Question

The graph plots displacement as a function of time for a mass oscillating on a spring. At what time are the displacement and acceleration in opposite directions?

### Choices

Choice (5) | Response | |
---|---|---|

a. |
| |

b. |
| |

c. |
| |

d. | Question does not provide sufficient data or is vague | |

e. | All of the above |

## Question number: 387 (2 of 2 Based on Passage) Show Passage

» Periodic Motion, Mechanical Waves & Sound

### Question

The graph plots displacement as a function of time for a mass oscillating on a spring. At what time (s) is the velocity of the oscillating mass equal to zero?

### Choices

Choice (5) | Response | |
---|---|---|

a. |
| |

b. | and | |

c. | and | |

d. | and | |

e. | All of the above |