A body initially at rest travels a distance of $100 m$ in $5 s$ with a constant acceleration. Find the final velocity at the end of $5 s$ .

20 m s^{- 1}

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30 m s^{- 1}

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35 m s^{- 1}

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40 m s^{- 1}

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Solution

The correct option is D $40 m s^{- 1}$
Given,
$u = 0$
$s = 100 m$
$t = 5 s$

Using $s = u t + \frac{1}{2} a t^{2}$ , we get $a = 8 m s^{- 2}$

$∴ v = u + a t = 0 + (8 \times 5) = 40 m s^{- 1}$

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A body initially at rest travels a distance of 100m in 5s with a constant acceleration. Find the final velocity at the end of 5s.

The correct option is D 40ms−1Given,u=0s=100mt=5sUsing s=ut+12at2, we get a=8ms−2∴v=u+at=0+(8×5)=40ms−1

A body initially at rest travels a distance of $100 m$ in $5 s$ with a constant acceleration. Find the final velocity at the end of $5 s$ .

The correct option is D $40 m s^{- 1}$
Given,
$u = 0$
$s = 100 m$
$t = 5 s$

Using $s = u t + \frac{1}{2} a t^{2}$ , we get $a = 8 m s^{- 2}$

$∴ v = u + a t = 0 + (8 \times 5) = 40 m s^{- 1}$