Velocity in a string, at a distance x, is given by
v=μμgx=gx
⇒dtdx=gx
⇒∫020xdx=g∫0tdt
On integrating, we get,
t=22s
JEE Main 2016 — Physics Waves & Oscillations
A uniform string of length 20m 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=10ms−2)
Held on 3 Apr 2016 · Verified 6 Jul 2026.
22s
2s
2π2s
2s
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