A 97.6-kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is μk = 0.555. (a) What is the magnitude of the frictional force?
(b) If the player comes to rest after 1.22 s, what is his initial speed?

Explanation:

From the Question we are told that:

Mass

Coefficient of kinetic friction  

Generally the equation for Frictional force is mathematically given by

Generally the  Newton's equation for Acceleration due to Friction force is mathematically given by

Therefore

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explanation: