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: Friction and acceleration

  1. May 15, 2008 #1
    [SOLVED] friction and acceleration

    A 2kg block(a) and a 5kg block(b) are on an inclined plane of 20degrees.
    Coefficient of kinetic friction 0.4
    Coefficient of static friction 0.4
    Calculate the size of mass M (a third mass attached to (b) by rope and pulley system)


    The attempt at a solution
    (a) fx=ma=-2g sin20 +Ff (Ff=o.38)
    :- a= -3.16
    fy=0=-2g cos20 +N
    :- N= 2g cos20
    = 0.94

    (b) fy=0=-5g cos20 -0.94+N (Ff=18.79)
    :- N= 46.98
    fx=ma=T-0.38-18.79-5g sin20
    :- a= (T-35.93)/5

    (c) fx=ma=mg+T
    :- a= g+T

    How do I use this working out to find tension in rope(T)?
     
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted



Loading...