JEE Main & Advanced
JEE Main Paper (Held On 9 April 2017)
question_answer
A standing wave is formed by the superposition of two waves travelling in opposite directions. The transverse displacement is given by\[y\,(x,\,t)\,=0.5\,\sin \,\left( \frac{5\pi }{4}x \right)\,\cos \,(2\text{oo}\,\pi t)\]. What is the speed of the travelling wave moving in the positive x direction? (x and t are in meter and second, respectively.) [JEE Online 09-04-2017]