The speed $v$ of a transverse wave moving along a uniform string is defined by $v = \sqrt{\frac{Tl}{m}}$, where $T$ is the tension in the string, $l$ denotes its length and $m$ its mass. An experiment is carried out to find the wave speed $v$. The readings are shown in Fig. 1.1.
(a)[1]
State an instrument that is appropriate for measuring the length $l$.
(b(i))[2]
Use the information in Fig. 1.1 to calculate $v$.
(b(ii))[3]
Use your answer in (b)(i) together with the data in Fig. 1.1 to find the value of $v$, with its absolute uncertainty, to a suitable number of significant figures.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Measured using a metre rule or a tape measure” …