A0.60-kg book slides on a horizontal table. the kinetic friction force on the book has magnitude 1.9 n . part a how much work is done on the book by friction during a displacement of 2.3 m to the left?

4.37 J

Explanation:

The work done by a constant force is given by:

where

F is the magnitude of the force

d is the distance through which the object has been moved

is the angle between the direction of the force and of the motion of the object.

In this problem:

- the magnitude of the force of friction is F = 1.9 N

- the distance is d = 2.3 m

- the angle is , because the direction of the friction is opposite to the direction of motion of the book

Therefore, the work done is