Time of Flight
The time of flight is twice the time to reach the maximum height,
tmax.
| Since the time to reach maximum height is |
tmax |
= |
| - vy(0)
|  |
| ay
|
|
| The time of flight is |
tflight |
= |
2tmax |
= |
| -2vy(0)
| |
| ay
|
|
= |
| 2 vo sinθ
| |
| g
|
|
The time of flight is determined solely by the initial y-velocity and
g. Motion along x is irrelevant!
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?
- 1:2:3
- 1:4:9
- It depends on the ratio of their masses