Question

A string is 5m long under the tension of 2N. A transversal wave propagates in the string at speed of 40m/s. The mass of the string is?
A. 6.25 gram
B. 6.5 gram
C. 6.75 gram
D. 6.885 gram
E. 6.90 gram

Answer 1

@Miracrown

Answer 2

speed = square root (Tension / mass per unit length)
\[s = \sqrt{\frac{ T }{ \mu }} \]
\[\mu = T/s^2\]
Mass of the string = mu * length of the string
Does this help ?

Answer 3

should just substitute the numbers into the equation @ShailKumar ?

Answer 4

Yes

Answer 5

mu means??

Answer 6

\[\mu \] is mu i.e mass/length

Answer 7

thank u i gt the answer A :) @ShailKumar

Answer 8

Great! :)