A disc of mass `m=50g` slides with the zero initial velocity down an inclined plane set at an angle
Channel: Doubtnut
Date: 2020-08-23

A disc of mass `m=50g` slides with the zero initial velocity down an inclined plane set at an angle `alpha=30^@` to the horizontal, having traversed the distance `l=50cm` along the horizontal plane, the disc stops. Find the work performed by the friction forces over the whole distance, assuming the friction coefficient `k=0.15` for both inclined and horizontal planes.