Question

a marble is allowed to roll down in inclined plane from a fixed height . at the foot of the inclined plane moves on a horizontal surface ( a) covered with silk b. covered with a layer of sand c. covered with a glass of sheet . on which surface will the marble move shortest distance ​

Answer 1

Answer:

The marble will move shortest on the floor covered with sand. Sand will allow more friction between marble and floor making it hard to move longer.

ANS: (b) COVERED WITH A LAYER

On the surface which is covered with sand, the marble will move the shortest distance. Because the sand will offer the greatest friction with the marble among the surface which is covered with silk cloth and the surface which is covered with glass sheet.

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Explanation: