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!

Forces and Pulleys of two blocks

  1. Jul 30, 2009 #1
    1. The problem statement, all variables and given/known data
    Two blocks are connected by a rope that passes over a set of pulleys. One block has a weight of 412N and the other has a weight of 908N. The rope and the pulleys are massless and there is no friction. (a) What is the acceleration of the lighter block? (b) Suppose that the heavier block is removed, and a downward force of 908N is provided by someone pulling on the rope. Find the acceleration of the remaining block. (c) Why are the answers in (a) and (b) different?

    2. Relevant equations
    weight = mass * acceleration(gravity)


    3. The attempt at a solution
    So mass = 42.0 kg for the smaller black and mass = 92.7 kg for the larger block.
    This is as far as I get.
     
  2. jcsd
  3. Jul 30, 2009 #2
    ***NOT AN EXPERT***

    If I were you, I would draw a force diagrams for each block. These kinds of problems can get really confusing if you don't sort out what forces are going where.
     
  4. Jul 30, 2009 #3

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Hi Cheddar! :smile:

    Call the tension T, do two F = ma equations, one for each block, and then eliminate T. :wink:
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Forces and Pulleys of two blocks
Loading...