Question

When a conservative force does positive work on a body

• A. The potential energy increases
• B. The potential energy decreases
• C. Total energy increases
• D. Total energy decreases

Answer 1

The correct option is B The potential energy decreases

In conservative force

$\overrightarrow{F}=\frac{-dV}{dr}$

$=\overrightarrow{F}.\overrightarrow{d}r=-dV$

$\int \overrightarrow{F}.\overrightarrow{d}r=-\int dV$

When work done is positive.

$-dV$ is negative so potential energy decreases.