Question

The motion of a ball dropped from a height of 20 m is a uniformly accelerated motion discuss​

Answer 1

Explanation:

Given, initial velocity of ball, u=0

Final velocity of ball, v=?

Distance through which the balls falls, s=20m

Acceleration a=10ms−2

Time of fall, t=?

We know

v2−u2=2as

or v2−0=2×10×20=400 or v=20ms−1

Now using v=u+at we have

20=0+10×t or t=2s