physics

A 62 kg water skier, moving at 14 m/s , lets go of the towline.
a.Find her momentum. 868kgm/s
b.What impulse is needed to bring her to rest? -868Ns
c.If the water exerts an average force of -275 N on the skier, how long must the force act? 3.16 s
d.How far does she travel during this time? ??

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