A block is kept at rest on ground. When a horizontal force is applied to the block, it doesn't move. The force which opposes this external force while the block is at rest is known as:

Static friction

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Sliding friction

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Magnetic force

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None of these

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Solution

The correct option is A
Static friction

The friction which comes into play when there is no relative motion between the surfaces in contact is known as static friction. Here, as the block is not slipping, static friction will come into play.

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A block is kept at rest on ground. When a horizontal force is applied to the block, it doesn't move. The force which opposes this external force while the block is at rest is known as:

The correct option is A Static friction The friction which comes into play when there is no relative motion between the surfaces in contact is known as static friction. Here, as the block is not slipping, static friction will come into play.

The correct option is A
Static friction

The friction which comes into play when there is no relative motion between the surfaces in contact is known as static friction. Here, as the block is not slipping, static friction will come into play.