A marble is allowed to roll down an inclined plane from a fixed height

cbse
cbse-class-8-science
friction

#1

A marble is allowed to roll down an inclined plane from a fixed height. At the foot of the inclined plane, it moves on a horizontal surface
covered with silk cloth
covered with a layer of sand and
covered with a glass sheet. On which surface will the marble move the shortest distance? Give reason for your answer.

Answer:

On the surface covered with sand, it will cover the least distance because sand offers maximum friction against its motion.