Chapter: Oscillations· Physics

The velocity of bob of a second's pendulum when it is 6 cm from its mean position and amplitude of 10 cm, is _____.

Q.1 (ix) The velocity of bob of a second's pendulum when it is 6 cm from its mean position and amplitude of 10 cm, is _____.

A. \(8\pi\) cm/s

B. \(6\pi\) cm/s

C. \(4\pi\) cm/s

D. \(2\pi\) cm/s

Doubtly Asked 29 Oct 2026 Board exam · March 2024 hsc 12th Save WhatsApp Report

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Answer: A. \(8\pi\) cm/s

Answer: (a) \(8\pi\) cm/s

For a seconds pendulum \(T = 2\) s, so \(\omega = \dfrac{2\pi}{T} = \pi\) rad/s.

\(v = \omega\sqrt{A^2 - x^2} = \pi\sqrt{10^2 - 6^2} = \pi\sqrt{64} = 8\pi\) cm/s.

Doubtly AI · 29 Oct 2026 AI-generated · not yet verified Report

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