Question

A stone is let to fall from a buillding of height 30m. The
ratio of heights fallen by it after 2s and 3s is ......................

Answer 1

Answer:

4/9

Explanation:

We know, $s = ut + 1/2*a*t^2$

Now, u = 0 since at start speed is 0.

Therefore,

$s_2 = 1/2 * g * 2^2$

$s_3 = 1/2 * g * 3^2$

$s_2/s_3 = 4/9$

Answer 2

Answer:

4/9

Explanation:

we know

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

here u=0 because initial (starting) velocity is 0

so,

(in Pic )

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