Question

7. A ball is gently dropped from a height of 20 m. if its velocity increases uniformly at the rate of 10 m/s², with what
will it strike the ground? After what time will it strike
ground?​

Answer 1

$s = ut + \frac{1}{2} a {t}^{2} \\ 20= 0 + \frac{1}{2} 10 \times {t}^{2} \\ {t}^{2} = 4 \\ t = 2$

Answer 2

Answer:

it will strike the ground at 200m/s² and it will take 10 s to strike the ground.

Explanation: