Work Energy Theorem — JEE Main Physics MCQs with Solutions
Free JEE Main Physics Work Energy Theorem 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 — Work Energy Theorem · easy · numerical
Starting from rest, a net work of 64 J is done on a 2 kg body. Its final speed is:
A. 32 m/s
B. 8 m/s ✓ Correct
C. 4 m/s
D. 16 m/s
Solution: ½mv² = 64 ⇒ v = √(64) = 8 m/s.
Q2 — Work Energy Theorem · medium · numerical
A 20 g bullet moving at 500 m/s penetrates 10 cm into a wooden block before stopping. The average resistive force is:
A. 25000 N ✓ Correct
B. 5000 N
C. 2500 N
D. 50000 N
Solution: KE = ½×0.02×250000 = 2500 J; F = KE/d = 2500/0.1 = 25000 N.