Question

A stone is thrown vertically upward with the velocity of 20m/s .Find the maximum height reached by the stone and the minutes, hours and micro seconds
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Answer 1

u = 20m/s
v= 0m/s
a = g

h = (uxu) / 2g ===> 40 m
t = sqrt 2h/g ==> 80/10 = 8s

8s = 0.13 mins = 0.0022 hrs= 8x10^6 microseconds