A 0.60-kg book slides on a horizontal table. The kinetic friction force on the b

Question

A 0.60-kg book slides on a horizontal table. The kinetic friction force on the book has magnitude 1.1 N .

Part A

How much work is done on the book by friction during a displacement of 2.3 m to the left?

Part B

The book now slides 2.3 m to the right, returning to its starting point. During this second 2.3-mdisplacement, how much work is done on the book by friction?

Part C

What is the total work done on the book by friction during the complete round trip?

Part D

On the basis of your answer to part C, would you say that the friction force is conservative or nonconservative?

Explanation / Answer

here,

mass ,m = 0.6 kg

kinetic friction force , ff = 1.1 N

a)

s = 2.3 m

the work done by the frictional force , Wff = ff * s * cos(180) J

Wff = - 2.53 J

b)

the work done by the frictional force , Wff = ff * s * cos(180) J

Wff = - 2.53 J

c)

as the net displacement is zero

the total work done on the book by friction during the complete round trip is -5.06 J

d)

the frictional force is a non-conservative force

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