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Limitation of Dimensional Analysis

A particle of...

Question

A particle of mass 100g is executing SHM with amplitude of 10 cm. When the particle passes through the mean position at t=0 its kinetic energy is 8 mJ. What is the equation of simple harmonic motion if initial phase is zero?

y=0.1 cos 4t

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y=0.1 sin 4t

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y=0.1 cos 2t

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y=0.1 sin 2t

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Solution

The correct option is B y=0.1 sin 4t
Hence, option $B$ is correct answer.

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