A body has an initial velocity 5 $m s^{- 1}$ . It is accelerating at 2 $m s^{- 2}$ . It's velocity after 10 second is

$20 m s^{- 1}$

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$25 m s^{- 1}$

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$15 m s^{- 1}$

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$10 m s^{- 1}$

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Solution

The correct option is B
$25 m s^{- 1}$

Given, initial velocity $u = 5 m s^{- 1}$ , acceleration $a = 2 m s^{- 2}$ , time $t = 10 s$ and final velocity $v$

We know that $a = \frac{v - u}{t}$

So, $2 = \frac{v - 5}{10}$

$20 = v - 5$

$v = 25 m s^{- 1}$

Suggest Corrections

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A body has an initial velocity of $4 m s^{- 1}$ and deceleration of $4 m s^{- 2}$ , then what is its final velocity after travelling 2 m?

v = u + 5 t

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5 m s^{- 1}

v

t

m s^{- 2}

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