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Q.

A body of 10 kg is acted by a force of 129.4 N if g = 9.8 m/sec2. The acceleration of the block is 10 m/s2. What is the coefficient of kinetic friction?

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a

0.25

b

0.03

c

0.30

d

0.01

answer is C.

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Detailed Solution

The net force on the body = Applied force – Friction

ma=F-μkmg ⇒μk=F-mamg=129.4-10×1010×9.8=0.3

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A body of 10 kg is acted by a force of 129.4 N if g = 9.8 m/sec2. The acceleration of the block is 10 m/s2. What is the coefficient of kinetic friction?