6. The net work done by kinetic friction
(a) is always negative
(b) is always zero
c) may be negative or positive (d) is always positive
Answers
Answer:
c)be negative or positive
Explanation:
May it is helpfull to you
Answer: Negative
Explanation:
The force of friction opposes the displacement (always) and does negative work.
Kinetic friction always works to resist motion. It therefore always acts in the opposite direction to the direction of motion and is therefore negative with respect to the surface.
Friction always hinders movement. The body acts against friction at the expense of its kinetic energy. Thus, work done by a body against friction always results in a loss of kinetic energy.
Work done by friction involves the motion of a moving body against the direction of the frictional force. A force acting on a body causes a displacement in its direction. Newton's third law of motion uses the frictional force against the body's motion as a reaction force.
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