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# Phys Sci. 8e-2

### Work,Power, MA, simple machines

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

A 45 kg runner with a force of 22 N will have what acceleration? | 0.49 m/s2 |

output divided by input equals? | Mechanical Advantage |

What is the mechanical advantage of an input force of 10 N with an output force of 100 N? | 10 |

Which pulley has the most mechanical advantage: one line or 4 line? | 4 line |

What is the work output of 200 Joules at 95% efficiency? | 190 Joules |

How far will 10,000 Joules move a 3300 N load? | 3 meters |

What is the mechanical advantage of a 100m long and 20m tall ramp that can move a 2500 kg mass? | 5 |

Friction causes energy to convert to what? | Thermal energy |

A force that moves an object in the SAME direction as the force is called...? | Work |

A lever with the fulcrum closest to the load would have the largest...? | Mechanical advantage |

The unit for work is the ? | Joule |

What is the average speed per hour if you drive 10 km in 15 minutes? | 40 km/h |

What is the required force of each chain on a swing to support the weight of 200 N? | 100 N |

The unit for power is the...? | Watt |

What is the MA of a ramp that is 3 meters long and 0.5 meter high? | 6 |

What happens to the speed of an object as potential energy is gained | decreases |

Power is? | How fast work is being done |

Which mechanical advantage is it when the input force is equal to the output force? | Mechanical Advantage 1 |

What is the length of the lever to the fulcrum called? | Li (Input) |

What is the length of the lever from the fulcrum to the load called? | Lo (Output) |

If you divide the Li by the Lo you get what? | Mechanical Advantage (MA) |

How do you figure the mechanical advantage of a ramp? | The length of the ramp divided by the height of the ramp |

Output force divided by Input force gives you what? | Mechanical Advantage |

Created by:
FordLCHS