CAPE Physics Unit 1 · 2015 · Paper 1 · Question Q7

The frequency of a transverse wave travelling along a stretched string of length, l, with tension, T, is given by f = \frac{1}{2l}\sqrt{\frac{T}{\mu}} Which of the following units of \mu will make the equation dimensionally consistent?

1. (A)\text{kg m}^{-1}
2. (B)\text{kg s}^{-1}
3. (C)\text{kg}^{-1}\text{ s}
4. (D)\text{kg}^{-1}\text{ m}