Solved: PHYSICS Question for NEET

NEET PHYSICSEasy

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

by the system against a conservative force

by the system against a nonconservative force

upon the system by a conservative force

upon the system by a nonconservative force

Definition: The change in potential energy ( $\Delta U$ ) is defined as the negative of the work done by the conservative force ( $W_c$ ). $\Delta U = -W_c$ [Class 11 Physics, Ch 6, Sec 5.7, Eq 5.7]
Analysis: For the potential energy to increase ( $\Delta U > 0$ ), the work done by the conservative force ( $W_c$ ) must be negative.
Interpretation: Negative work done by a force implies that the displacement is opposite to the direction of the force. This is equivalent to saying that work is being done against the conservative force (e.g., lifting a mass against gravity increases its gravitational potential energy).

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