Question

A car is brought to rest by applying brakes in 10 s.The retardation caused due to this is 2.5m s 2. Calculate the initial velocity of the car.

Answer 1

Dear Student,

$$\begin{gathered} \mathrm{v}=\mathrm{u}+\mathrm{at} \\ 0=\mathrm{u}+\left(-2.5\right)\times 10 \\ 0=\mathrm{u}-25 \\ \mathrm{u}=25\mathrm{m}/\mathrm{s} \end{gathered}$$