A rookie quarterback throws a football with an initial upward velocity component of 15.9 m/s and a horizontal velocity component of 18.0 m/s . Ignore air resistance.

Question

a) How much time is required for the football to reach the highest point of the trajectory?
c) How much time (after it is thrown) is required for the football to return to its original level?
d) How does this compare with the time calculated in part (a).
e) How far has it traveled horizontally during this time?

Answer 1

a) 15.9 / g = 15.9 m/s / 9.8 m/s^2

c) time up equals time down
... twice a)

e) time from c) times 18.0 m/s