Question

A 5.5 metre length of string has a mass of 0.035kg. If the tension in the string in 77N, the speed of a wave on the string is?

(a) 110m/s

(b) 165m/s

(c) 77m/s

(d) 102m/s

This question was posed to me in unit test.

The query is from Beats topic in chapter Waves of Engineering Physics I

Answer 1

The correct option is (a) 110m/s

Explanation: Here m=0.035/5.5 kg/m T=77N

v=√(T/m)=√((77×5.5)/0.035)=110m/s.