posted by Ben on .
Two objects with masses 4.90 and 2.10 hang 0.800 above the floor from the ends of a cord 7.20 long passing over a frictionless pulley. Both objects start from rest.
Find the maximum height reached by the 2.10 object.
The heavier object will move .8 m down, thelighter will move up an additional .8m.
max height= initial height+movement up.
I am surprised this problem was given in physics.
but how do you find the initial height?
bob, you fail to understand that the tension force has accelerated the lighter object upwards; when the heavier object hits the floor, the lighter object still has upward velocity. the magnitude of this velocity is determined by the magnitude of the tension force.