Q. A string of $7\ m$ length has a mass of $0.035\ kg.$ If tension in the string is $60.5\ N,$ then speed of a wave on the string is
A) $77\ m/s$
B) $102\ m/s$
C) $110\ m/s$
D) $165\ m/s$
Explanation
(c) $v = \sqrt{\frac{T}{m}} \Rightarrow v = \sqrt{\frac{60.5}{(0.035/7)}} = 110\ m/s$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.