Question:
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
(a) covered with silk cloth
(b) covered with a layer of sand and
(c) covered with a glass sheet. On which surface, will the marble move the shortest distance. Give reason for your answer.
Solution:
Marble will move the shortest distance on the layer of sand because it will exert a greater force of friction on the marble and other two surfaces like
silk cloth and giass sheet will exerta lesser friction force comparatively.