A pendulum bob of mass is pulled aside so that it is higher than its lowest position…

PHYSICS · Subjective · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

A pendulum bob of mass

0.20\,\text{kg}

is pulled aside so that it is

0.50\,\text{m}

higher than its lowest position and released from rest. At the lowest point the bob enters a

0.30\,\text{m}

long rough segment where a constant frictional force of

0.40\,\text{N}

acts on it. Find the speed of the bob immediately after it leaves the rough segment.