(a(i))[1]
On Fig. 1.1, show and label the length $l$ of one stride.
(a(ii))[1]
For the student's stride length, estimate a value. $l = \ldots$
(a(iii))[1]
Calculate how many strides the student takes when walking $100\,\text{m}$ using your value for $l$.
(b(i))[1]
Explain how a trundle wheel can be used to measure a distance of $100\,\text{m}$ for the track.
(b(ii))[1]
Explain why this is a more accurate way to measure a distance of $100\,\text{m}$ than the method in (a).