Question

The potential energy of a system increases if work is done:

• A. Upon the system by a non conservative force
• B. By the system against a conservative force
• C. By the system against a non conservative force
• D. Upon the system by a conservative force

Answer 1

Answer: (B)

By the system against a conservative force

When the work is done by the system against any conservative force the potential energy increases.

$-\Delta U=W_{conservativeforce}$