A car decreases its speed from $80 k m / h$ to $60 k m / h$ is $5 s e c o n d s$ . The acceleration of the car is :

-1.11 m/s²

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1.12 m/s²

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-1.14 m/s²

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1.11 m/s²

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Solution

The correct option is A
-1.11 m/s²

Here,

$u = 80 k m / h = 22.22 m / s$

$v = 60 k m / h = 16.67 m / s$

$t = 5 s$

Using, a = $\frac{v - u}{t}$

a = $\frac{16.67 - 22.22}{5}$ $m / s^{2}$

a = - 1.11 $m / s^{2}$

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