Question

A bus moving at 54 km/h on applying brakes it is stopped in 8 seconds find acceleration

Answer 1

$a = \frac{v - u}{t} \\ = \frac{0 - 54}{8} \\ = \frac{ - 54}{8} \\ = - 6.7m {s}^{ - 1}$
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Answer 2

Acceleration = v-u/t
= 0-54/8
= -54/8
= -6.7 …(approx)