Work done by a conservative force is positive if

P . E .

of the body increases

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P . E .

of the body decreases

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K . E .

of the body increases

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K . E .

of the body decreases

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Solution

The correct options are
B $P . E .$ of the body decreases
C $K . E .$ of the body increases
If force is conservative,

From the conservation of energy.

Total energy = constant

Potential energy + Kinetic energy = 0

Potential energy = - Kinetic energy

Work done = - Change potential energy = Change in kinetic energy

Hence, P.E of body decrease and K.E of body increase.

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(g = 10 m / s^{2})

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