Vi = 250 sin 45 = 125 sqrt 2 initial up
u = 125 sqrt 2 forever horizontal
v = 125 sqrt 2 - 9.81 t
v at top = 0
9.81 t = 125 sqrt 2
solve for t at top
h = Vi t - 4.9 t^2
solve for h at top
total time in air = 2 t
d = 2 u t
A cannon barrel is elevated at an angle of 45°. It fires a ball with a speed of 250 m/s. (For the following questions, ignore air resistance.)
(a) What height does the ball reach?
m
(b) How long is the ball in the air?
s
(c) What is the horizontal range of the cannon?
km
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