A body initially moving with a velocity of $5 m s^{- 1}$ attains a velocity of $25 m s^{- 1}$ in $5 s$ , find the acceleration of body in $m s^{- 2} .$

8 m s^{- 2}

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7 m s^{- 2}

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4 m s^{- 2}

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3 m s^{- 2}

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Solution

The correct option is A $4 m s^{- 2}$
Acceleration $= \frac{Final velocity - initial velocity}{time taken}$
Final velocity $v = 25 m / s$
Initial velocity $u = 5 m / s$
a $= \frac{25 - 5}{5} m / s^{2}$
a $= 4 m / s^{2}$

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