Question

A cannon fires a cannonball directly upwards at +150m/s. How long does it take for the cannonball to reach maximum height?

Answer 1

2 a (x - x0) = (v)^2 - (v0)^2
2(9.80m/s/s)((x - (0)) = (0)^2 - (150.m/s )^2
x = +1150 m
(3 significant digits)

x = +1147.959 m
(More digits if needed)