Friction is a force which always opposes the motion.
Friction is a force which always opposes the motion.
The correct option is B. False.
Friction does not always oppose the motion. For example, when a car is accelerating forward, the tyres push against the road in the backward direction. Friction pushes itself forward and the car also pushes forward. Thus friction and motion are in the same direction.
Similarly when a runner accelerates forward the shoe pushes backward, friction pushes forward and the runner pushes forward. Thus both are in the same direction.
Friction always acts to oppose any relative motion between surfaces. For example, if a book is resting on a flat table and no force is trying to move the book across the table, so there is no frictional force acting. If we try to slide the book across the table, however, friction will come into play.
The correct option is B. False.
Friction does not always oppose the motion. For example, when a car is accelerating forward, the tyres push against the road in the backward direction. Friction pushes itself forward and the car also pushes forward. Thus friction and motion are in the same direction.
Similarly when a runner accelerates forward the shoe pushes backward, friction pushes forward and the runner pushes forward. Thus both are in the same direction.
Friction always acts to oppose any relative motion between surfaces. For example, if a book is resting on a flat table and no force is trying to move the book across the table, so there is no frictional force acting. If we try to slide the book across the table, however, friction will come into play.
