Question: An 81-kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is 0.49. (a) What is the

An 81-kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is 0.49.
(a) What is the magnitude of the frictional force?
(b) If the player comes to rest after 1.6 s, what was his initial velocity?

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