Answer:
b.Opposite
Explanation:
Friction: It is that force which oppose the motion of any object.It is rubbing force.
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Friction always act in opposite direction of motion.
Friction force is applied to overcome the motion of object.
If equal friction force applied in opposite direction to applied force on the object due to which an object in motion then the object will come to in rest.
When applied force is not equal to friction force then motion will not come in rest and continue move.
Hence, friction force always acts in a direction opposite to the direction of motion.
Answer : b.Opposite
