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: Atwoods machine Problem.

  1. Oct 10, 2007 #1
    Using this site as a reference: http://hyperphysics.phy-astr.gsu.edu/hbase/atwd.html

    Can somebody show me how to solve this:

    Suppose you dont have a watch, or a timer, and you want to use an Atwood's machine as a timer to give an accurate time interval (for the vertical fall) of t = 10.0s. Suppose the vertical fall, y, is 1.30m. Determine values of M and m which would make t - 10s.

    Some formulas

    a = (2h)/t2
    g= a x ((2M+m)/m)/m
  2. jcsd
  3. Oct 10, 2007 #2


    User Avatar
    Homework Helper

    Find the acceleration using the formula you have.

    Then set this acceleration = [tex]\frac{M-m}{M+m}*g[/tex] (taking M as the heavier mass and m as the lighter mass of the atwood machine).

    this will only give a relationship between M and m. is there any more information for the problem?
  4. Oct 10, 2007 #3
    nope just that. Im guessing it might be sufficient just to have the relationship

    i'm assuming g= 9.80
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook