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First Equation of Motion

A car starts ...

Question

A car starts from rest and attains a velocity of 18 km/h in 2 seconds. Find its acceleration in SI units

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Solution

$D e a r S t u d e n t, G i v e n t h a t, u = 0, t = 2 s e c . v = 18 k m / h r = 18 \times \frac{5}{18} m / s = 5 m / s N o w a = \frac{v - u}{t} = \frac{5 - 0}{2} = 2.5 m / s^{2}$
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