A motorcyclist performs horizontal circular motion inside a well of inner radius 3 m. Calculate the minimum speed to perform the stunt if coefficient of static friction is 0.3. [\(g=10\) m/s2]

Q.2 (vii) A motorcyclist performs horizontal circular motion inside a well of inner radius 3 m. Calculate the minimum speed to perform the stunt if coefficient of static friction is 0.3. [\(g=10\) m/s²]

Doubtly Asked 28 Oct 2026 Board exam · June 2026 hsc 12th Save WhatsApp Report

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Answer: \(v_{min}=10\) m/s

The normal reaction of the wall gives the centripetal force, \(N=\dfrac{mv^2}{r}\), and friction balances the weight, \(\mu_s N\ge mg\). So \(v_{min}=\sqrt{\dfrac{rg}{\mu_s}}=\sqrt{\dfrac{3\times10}{0.3}}=\sqrt{100}=10\) m/s.

Doubtly AI · 28 Oct 2026 AI-verified · Oct 2026 Report

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A motorcyclist performs horizontal circular motion inside a well of inner radius 3 m. Calculate the minimum speed to perform the stunt if coefficient of static friction is 0.3. [\(g=10\) m/s2]

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