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: Box being pulled up a ramp on

  1. Mar 2, 2009 #1
    1. The problem statement, all variables and given/known data
    Suppose a box on a frictionless ramp is being pulled by a rope with a tension of 350 N making an angle of 50° to the horizontal ground. If the angle of incline of the ramp is 20°, and the box is pulled 5 m, determine the amount of work done. Hint: Draw a diagram and use vectors to represent the situation.

    2. Relevant equations

    3. The attempt at a solution
    AC/AB= cos20degress

    = (5)(250cos20)

    The work done is 1644J

    Is this solution correct?
  2. jcsd
  3. Mar 4, 2009 #2
    There is a mistake in your last calculation although the solution is correct. This should have been posted in Introductory physics, as I assume this was for a physics class?
  4. Mar 4, 2009 #3
    Sorry I didn't know this was the wrong place to post. What is the mistake that I made?
  5. Mar 4, 2009 #4


    User Avatar
    Science Advisor

    A typo- you have "250" rather than "350".:biggrin:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook