The figure represents the instantaneous picture of a transverse wave travelling along the negative x-axis. Choose the correct alternative (s) related to the movement of the 9 points shown in the figure. (Instantaneous velocity)

A perfectly elastic uniform string is suspended vertically with its upper end fixed to the ceiling and the lower end loaded with the weight. If a transverse wave is imparted to the lower end of the string, the pulse will

Options

A. not travel along the length of the string
B. travel upwards with increasing speed
C. travel upwards with decreasing speed
D. travelled upwards with constant acceleration

Answer

B, D

Explanation

`v=sqrt((T)/(mu))=sqrt((w+muxg)/(mu))=sqrt((w)/(mu)+xg)`
`rArr v^(2)=(w)/(mu)+xgrArr2v(dv)/(dx)=g rArr a=(g)/(2)`