# 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.

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The marble moves the shortest distance on the horizontal surface covered with a layer of sand as the force of friction produced between the surfaces of marble and the layer of sand is larger than the friction between marble and silk and also larger than the friction between marble and glass sheet.

Updated on 10-Oct-2022 13:29:12