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: A simple mechanic problem

  1. Oct 29, 2007 #1

    can anyone help me on the second question?
    i found the part a is
    1400 * 0.1 m = 140N,
    part b is 6.6m, part c is 14J, part d is
    but i don't know how to do the last two part.... help please!!
    is this correct?
    w=mgcos60 x 6.6m = 6.468 J..
    i don't know which distance should i use~
    0.1m or 6.6m?
    0.1m is form the spring and 6.6 is the total distance..
    how to find the maximum kinetic and potential energy of the block?
    Last edited: Oct 29, 2007
  2. jcsd
  3. Oct 29, 2007 #2


    User Avatar
    Homework Helper

    Are you certain that the distance up the incline and the work by the spring that you calculated are right?

    For the work by the spring... won't it just be (1/2)kx^2 = (1/2)(1400)(0.1)^2 = 7J ?

    I'm assuming the spring is compressed at 0.1m and then released?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook