A marble is allowed to roll down an inclined

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.

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