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20/09/2020 12:42 pm
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A clock has a continuously moving second's hand of 0.1 m length. The average acceleration of the tip of the hand (in units of ms–2) is of the order of :
(1) 10–3
(2) 10–1
(3) 10–4
(4) 10–2
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20/09/2020 12:47 pm
(1) 10–3
Explanation:
The instantaneous acceleration of tip is given by
ac = ω2R = (2π/60)2 x 0.1 = 1/900 ≈ 10–3