First slide

Static friction

Question

If an external force and the frictional force acting on a body cancel each other and keep the body at rest, the frictional force is

Easy

A

Rolling friction
B

Sliding friction
C

Static friction
D

None

Solution

Since the applied force is balanced by the frictional force , the body is stationary and in equilibrium , so the frictional force is static friction whose magnitude is equal to the static friction .

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