Q.

A large horizontal surface moves up and down in SHM with an amplitude of 1 cm. If a mass of 10 kg (which is placed on the surface) is to remain continually in contact with it, the maximum frequency of S.H.M. will be

Moderate

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0.5 Hz

1.5 Hz

5 Hz

10 Hz

answer is C.

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Detailed Solution

For body to remain in contact $a_{\max} = g$

$∴ ω^{2} A = g \Rightarrow 4 π^{2} n^{2} A = g$

$\Rightarrow n^{2} = \frac{g}{4 π^{2} A} = \frac{10}{4 {(3 .14)}^{2} 0 .01} = 25 \Rightarrow n = 5 Hz$

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