a stone is thrown upward with an initial velocity of 20m/s.air resistance is ignored.how far does it take to reach the top?

Answer 1

v = 20 - 9.81 t
v = 0 at top
t = 20/9.81= 2.04 seconds upward
h = average speed up * time = 10 * 2.04 = 20.4 meters up