A block is pulled on a rough horizontal surface by a constant horizontal force of

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

4\,\text{kg}

block is pulled on a rough horizontal surface by a constant horizontal force of

30\,\text{N}

. The coefficient of kinetic friction between the block and the surface is

0.25

. The block moves

5\,\text{m}

in the direction of the applied force. What is the net work done on the block? (a)

150\,\text{J}

(b)

101\,\text{J}

(c)

-101\,\text{J}

(d)

112.5\,\text{J}