A bus increases its speed from 36 km/h to 72 km/h in 10 seconds. Its acceleration is :

(a) 5 m/s²
(b) 2 m/s²
(c) 3.6 m/s²
(d) 1 m/s²

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Solution

Final velocity is = 72 km/h = 20 m/s
Initial velocity is = 36 km/h = 10 m/s
Time taken is 10 sec. so,
$Acceleration = \frac{20 - 10}{10} = 1 m / s^{2}$
So, the answer is
(d) 1 m/s²

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