Physics

Problem

A uniform string of length 20 m is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts moving up the string. The time taken to reach the supports is : (take

g = 10 \text{ ms}^{-2}

) a.

2\sqrt{2}

s b.

\sqrt{2}

s c.

2\pi\sqrt{2}

s d. 2 s

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