A block is pulled along a horizontal surface with kinetic friction coefficient

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

1.5\,\text{kg}

block is pulled along a horizontal surface with kinetic friction coefficient

\mu_k = 0.20

. The pulling force acts horizontally and increases linearly from

0

12\,\text{N}

over the first

2.0\,\text{m}

of motion, then remains constant at

12\,\text{N}

for the next

3.0\,\text{m}

. Using

g = 9.8\,\text{m/s}^2

, calculate the net work done on the block during the entire

5.0\,\text{m}

displacement.