A sewing machine needle is oscillating simple harmonically in a vertical line of length 6 cm with a frequency 30 per minute. The displacement of the needle 1/6s after crossing the mean position is

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3 √3 cm

√3 cm

3 cm

1.5 cm

answer is D.

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Detailed Solution

A=3cm,T=2sec; y=Asin⁡ωt

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