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A 68 kg in-line skater starts from rest and accelerates at 0.21 m/s2 for 15 s. (a) Find her final velocity and total kinetic energy

A 68 kg in-line skater starts from rest and accelerates at 0.21 m/s2 for 15 s. (a) Find her final velocity and total kinetic energy after the 15 s of travel. (b) If she exerts a breaking frictional force of 280 N, find her stopping distance.

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