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Question

The amplitude of a particle executing SHM is 2 cm and its frequency is 50 cycles/s.Its maximum acceleration will be

A
1972ms2
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B
19.72ms2
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C
1.972ms2
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D
zero
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Solution

The correct option is A 1972ms2
We know that a=ω2x and maximum x is amplitude A. Thus, maximum magnitude of acceleration, a=ω2A
Now, ω=2πf=100π (f=50)
Thus, maximum a=10000π2×0.02 (A=2 cm = 0.02 m)
Thus, a=1972m/s2 nearly

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