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

Hint:

In conservative forces, such as gravitational or electrostatic, potential energy increases when work is done against the force.

Answer 1

The Correct Option is B

Step 1: Work and Potential Energy.
When work is done on a system against a conservative force (e.g., gravity or electrostatic force), potential energy increases. In such a case, energy is stored within the system.
Step 2: Explanation of Options.
(A) A non-conservative force such as friction results in a loss of energy, not an increase.
(B) Correct: Work done by the system against a conservative force increases the potential energy.
(C) Non-conservative forces do not increase potential energy.
(D) Work done by a conservative force would reduce potential energy.
Step 3: Conclusion.
The correct option is (B), where work is done by the system against a conservative force.