What is the kinetic energy of a 1 kg ball thrown into the air with an initial velocity of 30 m/s

Welll ... we can do the math and the physics and get an answer
for you, but then we'll really want to step back into the real world
and see how feasible all of this is.

      Kinetic Energy = (1/2) (mass) (speed)²

                              = (1/2)  (1 kg)  (30 m/s)²

                              = (1/2)  (1 kg)  (900 m²/s²)

                              =     450 kg-m²/s²  =  450 joules .

That's the KE of the ball at the instant it leaves your hand,
moving at 30 m/s .  Immediately after that, we don't know
what happens to it.  It may lose speed, if you tossed it upward,
or it may gain speed, if you tossed it downward or horizontally. 
As soon as its speed changes, so does its KE.

And now, a word from the real world:
' 30 m/s ' is about 67 miles per hour, and the ball weighs a little
over 2 pounds.  Do you really think you could make that toss ?

You can find results and justify them? you can test your hypothesis