Q71 of 100 Page 232

A boy runs his toy car on dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be :

As the roughness of the surface increases, the friction force increases.

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What is meant by 'streamlined shape'? Name an object which usually has a streamlined shape.

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Explain why, objects moving in fluids should have streamlined shape.

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Four children were asked to arrange forces due to rolling, static and sliding frictions in a decreasing order. The correct arrangement is :

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A big wooden box is being pushed on the ground from east to west direction. The force of friction due to ground will act on this box towards: