A block of mass $m$ is at rest while a force is acting on it horizontally. What type of friction is opposing the movement of the block?

Rolling friction

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Kinetic friction

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Static friction

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All of the above

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Solution

The correct option is C
Static friction

When an external force acts on a block at rest, the body will move only when the net external force exceeds the maximum the static frictional force. If the body is still at rest, like given in the question, then the force opposing its motion is the force of static friction.

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