Question

a body is thrown vertically upwards with vilocity u find the greatest height h to it will rises

Answer 1

v^2=u^2-2as(since g is acting against it.
0=u^2-2as
u^2=2as
s=u^2/2a.
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Answer 2

given,
initial velocity=u m/s
final velocity=0m/s
A/Q,
we know,
v²-u²=2gh
0²-u²=2×(-10)×h
-u=-20×h
u/20=h
hence,
height=1/20 times of initial velocity u