Question #65bfb

1 Answer
Daniel W.
Aug 28, 2014

Use the kinetic energy equation:
#E_k=1/2mv^2#

The work (or energy) required to bring the object to rest is equal to the kinetic energy it has initially. [The reason is that in order to bring the object to rest its kinetic energy needs to be converted into heat.]

So #W = E_k = 1/2mv^2#

No need to know F or d.

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