Question

A body start from rest with an acceIration
4 m/s and travels a distance 10m what is the time taken to reach that distance
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Answer 1

Answer:$\sqrt{5}$

Explanation: According to second equation of motion,

s = ut + $\frac{1}{2}$a$t^{2}$

Here u= 0 as body starts from rest

s= 10m

a= 4 m/$s^{2}$, t = ?

Substituting the values, 10 = 0 * t + 1/2 (4)($t^{2}$)

10 = 2$t^{2}$

2$t^{2}$ - 10 = 0

$t^{2}$ - 5 = 0

t = $\sqrt{5}$