From a height of 125 m, a stone falls to the surface of the earth without initial velocity.

From a height of 125 m, a stone falls to the surface of the earth without initial velocity. How long does it take for it to reach the surface of the earth? What will be his speed at this moment? At what height will the stone be in 3 seconds after the start of the fall? What will be the speed of the stone at this moment in time? Neglect air resistance.

Solution:
h1 = 125 – 90/2 = 80m
h = gt2 / 2
250 = 10t2
t2 = 25
t = 5 because -5 is not coot. conv. tasks
v1 = gt = 30 m / s
Answer: 5c; 30 m / s; 80 m