A bus decreases its speed from 80km/h to 60km/h in 5 secs. find the acceleration of the bus?

Answers (1)
S Siddhi

\begin{array}{l} \text { Initial speed } u=80 \mathrm{km} / h=80 \times \frac{5}{18}=22.22 \mathrm{m} / \mathrm{s} \\ \text { Final speed } v=60 \mathrm{km} / \mathrm{h}=60 \times \frac{5}{18}=16.67 \mathrm{m} / \mathrm{s} \\ \text { Using } v=u+a t \\ \text { Or } 16.67=22.22+\alpha \times 5 \\ \Longrightarrow a=-1.1 \mathrm{m} / \mathrm{s}^{2} \end{array}

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