Conservative Force — JEE Main Physics MCQs with Solutions
Free JEE Main Physics Conservative Force MCQs with step-by-step solutions (2 questions). Part of Work, Power and Energy. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Conservative Force · easy · numerical
A 2 kg stone falls from a height of 10 m. The work done by the gravitational force on it is:
A. −200 J
B. +200 J ✓ Correct
C. Zero
D. +100 J
Solution: W_gravity = +mgh = 2×10×10 = 200 J (force and displacement are both downward). ΔU = −200 J.
Q2 — Conservative Force · medium · numerical
A ball is thrown up to a height of 10 m and returns to the throw point. The total work done by gravity over the entire trip is:
A. +200 J
B. −200 J
C. Zero ✓ Correct
D. −100 J
Solution: Up: −mgh; down: +mgh. Net = 0 — a closed path for a conservative force.