Practice question
Question
A 0.38kg stone in a vertical circle of radius 1.9m has a tension of 28N at the bottom. What is the tension at the top? (Take g\=10m/s2)
Explanation
At bottom: Tb−mg=mvb2/r⇒28−0.38×10=0.38×vb2/1.9. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 0.4. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.
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