Hi,(adsbygoogle = window.adsbygoogle || []).push({});

Im having a problem solving one part of a question..

1) A ball is thrown upward with the initial velocity of 80 m/s.

a- How long is the ball in the air? 16.33s

b- What is the greatest height reached by the ball? 326.26m

c- when is the ball 20m above the ground?

I think im doing this wrong, but I put 20 = v_0*t, 20/V_0 = t and i get 0.25s

d- what is the velocity of the ball, when it hits the ground?

On this one Im totaly lost, but I managed to get sqrt(2g+v^2+h) which I know is wrong.

I think a and b are correct but Im not so sure about the c and d, If you can read over it and see if it right I would appreciate it..

Thank You.

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# Homework Help: Velocity problem

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