Question

Work done by friction



(a) increase kinetic energy of body

(b) decrease kinetic energy of body

(c) increases potential energy of body

(d) decreases potential energy of body.

Clear selection


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Answer 1

Explanation:

(a) increase kinetic energy of body

Answer 2

Work done by friction decreases the kinetic energy of the body (option b).

• The frictional force is the force that opposes an object's motion when it begins to move.
• The kinetic energy of an object is the result of its motion.
• When a frictional force acts in the opposite direction on an object, it is referred to as a negative force or negative work done.
• As a result, the object loses kinetic energy and is unable to move if it is at rest or resists further movement if it is already moving due to friction.