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# Energy

### Mechanical Energy

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

Joule | The unit of measurement of energy 1 Joule = 1N*m |

Calorie | The unit of measurement of chemically stored energy 1 calorie = 4.184J |

Watt | The unit of measurement of Power 1Watt,W = 1Joule/1second |

Power | Work done over a given time period. Equation- P=W/t P - power (Unit = Watts, W) W - work (in joules) t - time (in seconds) |

Work | Force applied for a distance *Work can give an object energy OR take energy away from an object. Equation - W=F*d W - Work (Measured in Joules) F - force (in Newtons) d - distance (in meters) |

Energy | An object's ability to do work *All energy is measured in Joules |

Mechanical Energy | The total amount of Potential and Kinetic energy that an object has. Mechanical Energy = GPE + KE |

Gravitational Potential Energy | An object's energy due to the distance, or height, between itself and a surface. GPE=mgh GPE= Gravitational Potential Energy m= mass (in kg) g= gravity (9.8m/s/s *No negative, energy is scalar) h= height/distance in Y-axis (in meters) |

Chemical Potential Energy | An object's energy due to chemical bonding. *Food, gas, oil are all examples. |

Elastic Potential Energy | Energy stored due to the stretching or compressing of a material such as a spring, rubber band, or other elastic material. Energy is created by the distance compressed or stretched. |

Kinetic Energy | An object's energy due to its velocity! KE=1/2mv^2 KE=Kinetic Energy m - mass (in kg) v - velocity (in m/s) Unit - Joules |