Physics-
General
Easy
Question
An airplane, diving at an angle of 
with the vertical releases a projectile at an altitude of 730 m. The projectile hits the ground 5.00 s after being released. What is the speed of the aircraft?
The correct answer is:
Since the projectile is released its initial velocity is the same as the velocity of the plane at the time of release
Take the origin at the point of release
Let 
and 
be the coordinates of the point on the ground where the projectile hits and let 
be the time when it hits. Then
where 
This equation gives
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