- #1
Peter P.
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Homework Statement
When the 65-kg cylinder is released from rest, the spring is subjected to a tension of 75. Determine the speed of the cylinder after it has fallen 300. How far has it fallen when it momentarily stops?
Given Diagram:
Homework Equations
The Attempt at a Solution
I started with a displacement equation. When the mass has fallen 300 mm (or 0.3 m), the string should stretch 0.6 m. I think that i can use F = kx, where F = T. So then the spring is already stretched by 0.25 m. From the free body diagram of the cylinder, i know that there will be potential gravitational energy, and a tension force acting in the opposite direction. Heres my long shot, but can i make the tension be represented by the potential energy of the spring (Vs = 0.5ks2). Then i get a little lost in whether or not i can do that.
Thanks in advance for any help.