Question

A steel wire with mass per unit length $70 \times 10^{-3} kg\, m ^{-1}$ is under tension of $70 \,N$.
The speed of transverse waves in the wire will be:

• A. $10 \,m / s$
• B. $100\, m / s$
• C. $200 \,\pi m / s$
• D. $50\, m / s$

Answer 1

Answer: (B)

$100\, m / s$

Answer 2

$v= \sqrt\frac{T}{μ} = \sqrt\frac{70}{70\times10^{-3}} =100m/s$