A force F is applied towards right on a block sliding at a speed of 2 m/s on a horizontal surface as shown below. Choose the correct statement regarding friction acting on the block at this instant.

No friction will act on the block.

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Static friction will act on the block.

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Kinetic friction will act on the block opposite to applied force.

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Kinetic friction will act on the block in direction of applied force.

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Solution

The correct option is D Kinetic friction will act on the block in direction of applied force.
The block is sliding towards left on the surface. Hence, friction will act rightwards (i.e. in the direction of applied force). The applied force will simply decrease the speed of block.

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A force F is applied towards right on a block sliding at a speed of 2 m/s on a horizontal surface as shown below. Choose the correct statement regarding friction acting on the block at this instant.

The correct option is D Kinetic friction will act on the block in direction of applied force.The block is sliding towards left on the surface. Hence, friction will act rightwards (i.e. in the direction of applied force). The applied force will simply decrease the speed of block.

The correct option is D Kinetic friction will act on the block in direction of applied force.
The block is sliding towards left on the surface. Hence, friction will act rightwards (i.e. in the direction of applied force). The applied force will simply decrease the speed of block.