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# Physical Science

### Final Study Guide

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

Know the Definition of Motion | a change in the position of an an object compared to another object |

Know the label for speed | mph, m/s, km/min |

Know what acceleration due to gravity is | the change in velocity caused by a gravitational force |

Know the definition of acceleration | change in speed over a certain time |

Know the definition of velocity | speed in a given direction |

Be able to calculate acceleration using Newton’s 2nd Law | What is the acceleration of a 10 kg object with a force of 200 N? Answer: 20 m/s^2 Formula: Acceleration= force divided by mass |

Know the formula for Newton’s Second Law | states that acceleration depends on the objects's mass and the amount of net force applied to it |

Know the formula for newton's third law | state that for every action there is an equal and opposite reaction |

Know that the more mass an object has, the greater the speed and acceleration | Example: Bowling ball will have more momentum than a ping pong ball because it has more mass |

Know the definition of law of conservation of energy | Energy that stays constant |

Know the definition of a wedge and compound machine | an object with at least on slanting side ending in a sharp edge, which cuts material apart a machine consisting of two or more simple machines operating together, as a wheelbarrows consisting of a lever, axle, and wheel |

What is power measures in? | Power is measured in watts |

Example: a sound wave will continue travelling until its energy is “lost” or transferred into another type | Waves travel as long as they have energy. |

What happens when the wave is slow? | The slower the wave, the longer the wavelength |

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