From rest, a car attains a speed of $1.5 m / s$ in $3 s$ . What is the value of acceleration of the car?

4.5 m s^{- 2}

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0.5 m s^{- 2}

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2 m s^{- 2}

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0

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Solution

The correct option is B $0.5 m s^{- 2}$
Initial velocity, $u = 0$
Final velocity, $u = 1.5 m s^{- 1}$
Time $t = 3 s$
$∴$ accelaration, $a = \frac{u - v}{t} = \frac{1.5 - 0}{2} m s^{- 2} = 0.5 m s^{- 2}$

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