If the vertical component of velocity for a projectile is 7.3 meters/second, find its hang time.

Question

A. 1.9 seconds
B. 2.5 seconds
C. 5.6 seconds
D. 6.7 seconds
E. 7.1 seconds

Answer 1

v = vi - g t
at top v = 0
0 = 7.3 - 9.8 t
t = .745 s to top
same amount falling back so
2 * t = 1.49 seconds in the air

Now that is quite enough. You try some.

Answer 2

9.8 (gravity) - 7.3 (velocity) = 2.5, B