• # question_answer A string of mass m and length L is hung vertically from a ceiling and a mass m is attached its lower end. A wave pulse is generated at the lower end. The velocity of the generated pulse as it moves up towards the ceiling will: A)  remain constant  B)  increaseC)  decrease linerely D)  decrease non-linerly

As the pulse goes up the tension in the string increases and velocity in the strong, $V\propto \sqrt{T}$ $\therefore$Velocity of the pulse will keep increasing at the pules moves upwards (i.e., towards the oiling).