1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Forces question

  1. Mar 19, 2007 #1
    i have this question for an engineering science assignment, and cant remember how to work it out, any help would be greatly appreciated.

    Question:
    A car of mass 1500kg has a max speed of 144km/h up an incline of 1 in 49 against a frictional resistance of 500N. Calculate the power of the engine.
     
  2. jcsd
  3. Mar 19, 2007 #2
    Neglecting the usual frictional losses in the engine and drivetrain, air resistance, etc, which reduce auto efficiency to about 25%, it would seem at a steady state where acceleration=0, whatever force being generated is just equal to the opposing gravitational force and frictional force. I would think then that you need to look at the displacement, both vertical and against friction to compute the work done by the engine. Hope thats a help as one is supposed to show work prior to any major assistance being given.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Forces question
  1. Tension Force Question (Replies: 8)

  2. Forces question (Replies: 1)

  3. Forces question (Replies: 1)

  4. Force Question (Replies: 3)

Loading...