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: Newton's Third Law-two masses on a wedge

  1. Oct 7, 2009 #1
    3. The attempt at a solution

    8 kg block:

    T-m2g = -m2a

    T-m1g sin(theta)- u m1g cos (theta) = m1a
    T -m2g=-m2a

    subtract equations:

    -m1gsin(theta)-umigcos(theta) + m2g =
    (m1+m2)a

    or a = g(m2-m1sin(theta)-m2cos(theta)/(m1+m2)

    substituting values:

    a=g(8-10sin(30)-0.2(10)cos30)/(18)

    a=0.69m/s/s

    b)

    vf^2=v0^2+2ad to find final velocity, knowing v0=0, a=0.69m/s/s and d=0.4m
     
    Last edited: Oct 8, 2009
  2. jcsd
  3. Oct 7, 2009 #2
    Your 1st part looks good so therefore i think the second part should be alright since its just subsituting values inside. So whats your question haha:biggrin:
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook