Question

A ball is projected vertically up word from the top of tower 60m ,hight with velocity 30m ,what is the mex heigh above the ground leve? How long it take to reach the ground

Answer 1

For upward decelerated motion
v=Vo-gt
Since v=0, Vo=gt.
Let g= 10 m/s2,
t=Vo/g=30/10=3 s.
h=Vo•t-(gt^2)/2 =
=30•3-10•9/2=45 m.
Total height
H=45+80=125 m.
H=gt^2/2,
t=sqroot(2H/g)=sqroot (2•125/10)=5 s.

Answer 2

rubbish