Question

A projectile is fired horizontally at 180 m/sec from an altitude of 734.7 m. What is the final vertical velocity of the projectile as it hits the ground?

Answer 1

216 m/s

Step-by-step explanation:

Final velocity will be resultant of the initial horizontal velocity ( 180 m/s) and the vertical velocity from falling 734.7 m

Verital vf = at need to find time

df = 734.7 = 1/2 a t^2

t= 12.2 sec

vf = at

= 9.81 (12.2) = 120 m/s

Just before hotting the ground,

resultant velocity = sqrt(180^2 + 120^2) = 216 m/s