Question

A block of mass $5kg$ is on a rough horizontal surface and is at rest. Now a force of $24N$ is imparted to it with negligible impluse. If the coefficient of kinetic friction is $0.4$ and $g=9.8m/s^2$ then the acceleration of the block is

• A. $0.26m/s^2$
• B. $0.39m/s^2$
• C. $0.69m/s^2$
• D. $0.88m/s^2$

Answer 1

The correct option is D $0.88m/s^2$

$F-f=ma$

$24-(0.4\times 5\times 9.8)=5\times a$

$\therefore a=0.88m/s^2$