On applying a force, a block starts sliding on a fixed rough horizontal surface as shown below. What is the direction of frictional force acting on it?

Towards right

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Towards left

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Vertically upwards

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Vertically downwards

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Solution

The correct option is B
Towards left

As the surface is rough, frictional force will act between the block and the surface. Friction opposses the relative motion of an object hence acts in the opposite direction. Here, as the block is sliding towards right, friction will act towards left.

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