Hello PF, I have a problem that I cannot solve.(adsbygoogle = window.adsbygoogle || []).push({});

Assuming my car weighs 4000 pounds with passengers and cargo and is travelling at 100 feet per second, this requires 4000lb*100ft/s = 400,000 ft-lb/s or 727.3 hp of work. But I know the engine is only producing about 50 or 60 hp, and I'm maintaining speed! So... what gives? What am I missing?

Thank you so much for your help!

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# How much power does my car actually need to maintain speed?

Loading...

Similar Threads - much power does | Date |
---|---|

How much pressure do I need to power a keg full of coffee | Oct 31, 2016 |

Automotive How to calculate how much power required to turn a flywheel? | Jun 9, 2016 |

Automotive How much magnetic power is needed to stop a slow car. | May 25, 2012 |

How much power does vavletrain use? | Jan 20, 2011 |

**Physics Forums - The Fusion of Science and Community**