Physics hw questions show work [;z?

Question

a skydiver falls from the sky(from restO and takes about 600 seconds to fall. How far up was he when he jumped?

you throw an ball downward from a windowat a speed of 2 m/s. tHE BALL accelerates at the speed of 9.8m/s2. how fast is it moving after 5 seconmds?

Answer 1

a.

y = 0.5gt^2

y = 0.5(9.8)(600^2)

b.

vf=vi + at

vf = 2 + 9.8(5)