A man generates a symmetrical pulse in a string by moving his hand up and down

PHYSICS · Single correct · CBSE · Physics · Waves · Waves

Problem

A man generates a symmetrical pulse in a string by moving his hand up and down. At

t=0

, the point at his hand moves downwards from the mean position. The pulse travels with speed

3\text{ m s}^{-1}

on the string and his hand passes through the mean position

6

times each second. The point on the string at a distance of

3\text{ m}

will first reach its upper extreme at

t=

(1)

1.25\text{ s}

(2)

1\text{ s}

(3)

\frac{11}{12}\text{ s}

(4)

\frac{23}{24}\text{ s}