PHYSICS QUESTION NEED HELP IMMEDIATElyyyyy!!!!!!!!!!!!!!!!!!!!!!!!!!!?

Question

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 16 m/s. The cliff is h = 36 m above the water's surface.

(a) How long does it take for the stone to fall to the water?

(b) With what speed does it strike the water?

Answer 1

a) t=sqrt(2h/g)
t=sqrt(2 x 36 / 9.81)=
t=2.71 sec

b)Vy=gt=

Vy=9.81 x 2.71=26.6 m/s

V= sqrt(Vx^2 + Vy^2)
V=sqrt( 16^2 + 26.6^2)=
V=31 m/s