- #1
caltzx
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Homework Statement
A wooden crate is pushed across a concrete floor at 5 m/s and released. It slides to a stop after moving a short distance. The same crate is filled until it weighs twice as much as it previously did and again slid across the floor at 5 m/s when released. The stopping distance for the crate will be...
a) 1/4 as far.
b) 1/2 as far.
c) the same distance.
d) twice as far.
e) four times as far.
The Attempt at a Solution
I thought this has something to do with kinetic energy. Since they both are released at 5 m/s but the latter has twice the mass, the second one should have twice the kinetic energy?
Therefore, I thought it would travel twice as far.
However, the answer given is: c) the same distance. Is this true? And if so, why?
Thanks. =)