47. mmh 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?

 

 

 

 

 

Finally use Kinematics to find initial velocity

 

 

Since speed is reduced ax is in opposite direction of the initial velocity.

 

 

 

 

 

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This page last updated on January 11, 2020