A bus decreases its speed by 80 kmph in 5s. Then acceleration of the bus is

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2.22ms^-2

1.11ms^-2

11.1ms^-2

-4.44ms^-2

answer is B.

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Detailed Solution

$Δv = - 80 kmph$
$\begin{array}{l} = - 80 \times \frac{5}{18} m / s \\ Δt = 5 s \\ a = \frac{Δv}{Δt} = \frac{- 80 \times \frac{5}{18}}{5} \\ = - \frac{80}{18} = - 4 .44 {ms}^{- 2} \end{array}$

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