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# Rainbow 4-6

### Acceration Due to Gravity, Play Ball and Making Waves

Question | Answer |
---|---|

True or False. Any two objects, regardless of their mass, have the same acceleration under gravity? | True |

Acceleration due to gravity is? | Constant That is, it is the same for every object. |

Why does a feather not fall at the same rate as a brick? | Because of friction |

What's the acceleration rate of any object dropped from above the earth? | 9.8 meters per second for every second it travels. For every additional second of falling, its velocity would increase by 9.8 meters per second: 19.6 meters per second after two seconds, 29.4 after three, 39.2 after four, 49.0 after five, and so on |

What is an orbit? | A circular motion |

Wave motion results from the action of focres on what? | Fluid (substances that "Flow." |

Is air a fluid? | Yes -- it moves in waves |

What is the branch of mathematics that deals with waves and other curves? | Trigonometry |

What is the process that makes strings on musical instruments, sound, earth tremors, light, radio signals, and X-rays to be compressed and expanded. | Vibration |