Is it true that friction force always acts in the opposite direction of motion?

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True

False

answer is B.

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Detailed Solution

The above statement is False.
Friction is a force that opposes motion. When two objects are in contact, friction acts in a direction opposite to the object's motion. For example, When we apply the brake to the car, friction acts in the opposite direction of motion. If the car moves in the east direction, friction will act in the west direction. Hence, it always opposes relative motion. So, the frictional force prevents an object from moving about the surface with which it is in touch.
The correct statement would be friction not always opposes the direction of motion.

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