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Underline the correct alternative:(a) When a conservative force does positive work on a body, the potential energy of the body increases/decreases/remains unaltered.(b) Work done by a body against friction always results in a loss of its kinetic/potential energy.
Underline the correct alternative:
(a) When a conservative force does positive work on a body, the potential energy of the body increases/decreases/remains unaltered.
(b) Work done by a body against friction always results in a loss of its kinetic/potential energy.
CBSE | Class 11 | NCERT | Physics | Work, Energy, and Power
Underline the correct alternative:
(a) When a conservative force does positive work on a body, the potential energy of the body increases/decreases/remains unaltered.
(b) Work done by a body against friction always results in a loss of its kinetic/potential energy.

(a) Decreases

When a body is displaced in the direction of the force, the conservative force does positive work on it, causing the body to migrate to the center of force. As a result, the distance between the two reduces, and the body’s potential energy diminishes.

(b) Kinetic energy

When work is done in the opposite direction of friction, the velocity of the body is reduced. As a result, the kinetic energy drops.

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