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Old May 11th 2009, 06:01 PM   #1
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Rubber Band Problem

Basically a small box was released with a rubber band. The box was held by a rubber band. The box was released on a flat wooden surface. The problem is:

Create a equation that will solve for distance that the box travels after losing contact w/ the rubber band.
Variables available for use:delta D, g, delta X , m(mass), K and Mew
No other information was given.

Thank you.

Last edited by spade94; May 11th 2009 at 06:06 PM.
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Old May 11th 2009, 06:27 PM   #2
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Old May 12th 2009, 09:10 AM   #3
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The P.E. of the stretched rubber band = 0.5 x k x (delta D)^2
This will be equal to the initial K.E. of the box = 0.5 x m x u^2.
Equate both and get u^2.

Now, this K.E. is used up in doing work against the force of friction

F = - MU x mg. Let the box stop after a distance = s . So work W = F.s.
Now equate every thing and work it out.
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