Question

The negative of the work done by the conservative internal forces on a system equals the change in:

• A. Potential energy
• B. Kinetic energy
• C. Total energy
• D. None of these

Answer 1

Answer: (A)

Potential energy

Relation between conservative force and potential energy is,
$F_{cons}=-dU/dx$

$F_{cons}.dx=-dU$

$-W=-\int F_{cons}.dx=\Delta U$