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!

Work with Velocity Help

  1. Oct 2, 2006 #1
    A skier of mass 71 kg is pulled up a slope by a motor-driven cable.
    (a) How much work is required to pull him a distance of 55 m up a 30° slope at a constant speed of 1.1 m/s

    I'm having trouble trying to figure out where velocity comes into play here. Originally I was using the equation W=Fcosø ∆r and I found F using F=mgsinø. But my homework says this is wrong so I'm begging someone to help me out here.
    Thanks
     
  2. jcsd
  3. Oct 2, 2006 #2

    Hootenanny

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    You can answer this question one of two ways;

    (1)Reslove the forces and find the tension in the cable, then multiply by the distance traveled up the slope.

    (2)Find the work done against gravity (W = mgh).
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Work with Velocity Help
  1. Work and velocity (Replies: 3)

  2. Help with Velocity (Replies: 2)

  3. Help with velocity (Replies: 4)

  4. Work and velocity (Replies: 2)

Loading...