1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Work Done question

  1. Jun 6, 2014 #1
    1. The problem statement, all variables and given/known data

    If someone is pushing an object up a ramp 2.6m long and 1.1m at the far end how do I calculate total work done?

    I know the force needed to push the object is 220N.

    2. Relevant equations

    Work Done = Force x Distance

    3. The attempt at a solution

    Do I do 2.6 x 220 and add this to 1.1 x 220?

    Therefore getting 814J?

    Last edited by a moderator: Jun 6, 2014
  2. jcsd
  3. Jun 6, 2014 #2


    User Avatar

    Staff: Mentor

    In what direction is the person pushing? Horizontally? Or parallel to the surface of the ramp, i.e. upwards at some angle? Or in some other direction?

    Do you know how to calculate work when the force is not in the same direction as the motion?
  4. Jun 6, 2014 #3
    The person is pushing the object up the ramp at an unknown angle.

    Presumably I would use Work Done = Force x Distance but do I just use the length of the ramp or do I need to take the height into consideration?

    Thanks for the reply
  5. Jun 6, 2014 #4


    User Avatar
    Homework Helper

    The force needed to push the object is 220 N. That is the minimal force which makes the object moving up the ramp. So it is also directed along the slope.

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted