Time of Flight

Time of flight is t =
2 vo sin(θ)
g

where g = 9.8 m/s2

The time of flight is also determined solely by the initial velocity in the y direction and the acceleration due to gravity.

Three balls are launched straight up in the air. The ratio of their initial speeds is 1:2:3, in the order red:green:blue. What is the ratio of their times of flight, in the same order?

  1. 9:4:1 (0/31) (0%)
  2. 3:2:1 (1/31) (3%)
  3. 1:2:3 (26/31) (84%)
  4. 1:4:9 (4/31) (13%)
  5. It depends on the ratio of their masses (0/31) (0%)