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A young girl (m= 30 kg) rides a skateboard (m= 3.2 kg) at a speed of 4.2 m/s.

(a)
How much work does
the girl have to do to bring herself to a stop?
(b)
How far does she travel if it takes 6.0 s to stop?
(c)
What
is the magnitude of the stopping force?

So I know W=Fd, but I am having trouble figuring out how to factor in her stopping. Does her stopping make a final velocity of 0? Help! So confused.

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