A car initially at rest starts moving with a constant acceleration of $0.5 m s^{- 2}$ and travels a distance of $25 m$ . Find the time taken.

10 s

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20 s

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30 s

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40 s

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Solution

The correct option is A $10 s$
Given,
$u = 0$
$a = 0.5 m s^{- 2}$
$s = 25 m$

so, using $v^{2} = u^{2} + 2 a s$ , we get $v = 5 m s^{- 1}$

$∴$ time, $t = \frac{v - u}{a} = \frac{5 - 0}{0.5} = 10 s$

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A car initially at rest starts moving with a constant acceleration of 0.5ms−2 and travels a distance of 25m. Find the time taken.

The correct option is A 10sGiven,u=0a=0.5ms−2s=25mso, using v2=u2+2as, we get v=5ms−1∴ time, t=v−ua=5−00.5=10s

A car initially at rest starts moving with a constant acceleration of $0.5 m s^{- 2}$ and travels a distance of $25 m$ . Find the time taken.

The correct option is A $10 s$
Given,
$u = 0$
$a = 0.5 m s^{- 2}$
$s = 25 m$

so, using $v^{2} = u^{2} + 2 a s$ , we get $v = 5 m s^{- 1}$

$∴$ time, $t = \frac{v - u}{a} = \frac{5 - 0}{0.5} = 10 s$