High School

A 103-kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is μk = 0.702. (a) What is the magnitude of the frictional force? (b) If the player comes to rest after 1.02 s, what is his initial speed?

Answer :

A 103-kg baseball player slides into second base. The magnitude of frictional force will be 708.598 N and his initial speed will be 7.017 m/s

Elaborating:

m = 103 kg

μk = 0.702

f = μk N

= μk mg

= 0.702 × 103 ×9.8

= 708.5988 N

b . μ mg = ma

a = μg

= 6.8796 m / s ²

vf = o m/s

vi= ?

t = 1.02 s

vf = vi + at

0 = vi - 6.8796 × 1.02

vi = 7.01719 m / s

How exactly does frictional force function?

The tiny bumps push against each other when two surfaces slide over one another. On a surface, friction exerts a force in the opposite direction of its motion. Rubbing can be decreased by the utilization of ointments

Significance

Rubbing can pump the brakes and prevent fixed things from moving. In a world without friction, more things would slide around, it would be hard to keep clothes and shoes on, and it would be very hard for people or cars to move or change direction.

Learn more about frictional force:

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