Question

a stone is thrown vertically upwards with a velocity of 20 m per second what will be the maximum height attained by the stone and how much it will take you to each there. [value of g is equals to 10 m per second square]

Answer 1

s=v^2-u^2/2a

=0-(20)^2/2 (-10)

=-400/-40

=10m

t=v-u/a

=0-20/-10

=-20/-10

=2s

Answer 2

from v^2- u^2=2aS

v=0 at max height and a= -g and S=H

H=u^2/2g

=20x20/2x10

20m= Ans