A wave in a string has an amplitude of 2...

A wave in a string has an amplitude of `2 cm`. The wave travels in the `+ve` direction of x axis with a speed of 1`28 ms^-1` and it is noted that `5` complete waves fit in `4 m` length of the string. The equation describing the wave is

` y = ( 0.02 ) msin ( 7.85 x + 1005t ) `

` y= ( 0.02) msin ( 15.7 x- 2010t) `

` y= ( 0.02)msin ( 15.7x + 2010t)`

` y= (0.02)msin ( 7.85 x - 100 5t ) `

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