Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: How much work is done by force

  1. Oct 20, 2008 #1

    Ink

    User Avatar

    Hi everyone

    I have a question

    A force acting on an object moving along the x-axis is given by Fx=(10x-2.0x^2)N
    Where x is in m. how much work is done by this force as the object moves from x=-1 to x=+6

    My answer was:
    when it says the object moves from -1 ro +6, that means it looks like triangle and the hight will be 6m

    I used this formula to getthe area of triabgle
    Wab = 1/2 (base) (high), where the high is 6, but what is the base?

    Here I am lost
     
  2. jcsd
  3. Oct 20, 2008 #2

    LowlyPion

    User Avatar
    Homework Helper

    What they are wanting is the integral of the function over the range -1 to +6

    Fx = 2*x -10*x2
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook