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 support is (Take, g = 10 m s - 2 )

Question

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 support is (Take, g = 10 m s - 2 ), 2 2 s, 2 s, 2 π 2 s, 2 s

MARKS App · Accepted Answer

Velocity in a string, at a distance x , is given by v = µ g x µ = g x ⇒ d x d t = g x ⇒ ∫ 0 20 d x x = g ∫ 0 t d t On integrating, we get, t = 2 2 s

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