Question

.A string of mass 0.8kg is stretched between 9cm a part. It is observed that when
one pole is struck the transverse pulse reaches the other pole in 0.3sec. What is the
tension in the pole?

Answer 1

Answer on Question #72317-Physics-Other

A string of mass 0.8kg is stretched between 9cm a part. It is observed that when one pole is struck the transverse pulse reaches the other pole in 0.3sec. What is the tension in the pole?

Solution

The speed of wave is

$$v = \frac {l}{t}.$$

But

$$v = \sqrt {\frac {T}{\frac {m}{l}}}$$

Thus,

$$\frac {T}{\frac {m}{l}} = \left(\frac {l}{t}\right) ^ {2}$$

The tension in the pole is

$$T = \frac {m l}{t ^ {2}} = \frac {(0 . 8) (0 . 0 9)}{0 . 3 ^ {2}} = 0. 8 N.$$

Answer: 0.8 N.

Answer provided by AssignmentExpert.com