(a)[3]
Determine the value of $u$.
(b)[1]
Determine the acceleration during the first $u$ seconds.
Mathematics 0580 · IGCSE · Graphs in practical situations
Graphs in practical situations — practice question
A speed-time graph (not to scale) depicts a car beginning from rest, increasing its speed for $u$ seconds until it reaches $10\,\text{m s}^{-1}$, and then continuing at $10\,\text{m s}^{-1}$ for $2u$ seconds. The distance covered in the first $3u$ seconds is 125 m.