Practice question
Question
A 0.5kg pendulum bob is given a speed at the bottom to complete a 1m vertical circle. What is the speed at the bottom? (Take g\=10m/s2)
Explanation
At top, vC=gL, energy conservation: 12mv02=12m(gL)+2mgL. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 12 m. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.
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