"An airplane if flying level at 80.0m above the ground with a speed of 350km/h. The bombardier wishes to drop food and medical supplies to hit a target on the ground. At what horizontal distance from the target should the bombardier release the supplies?"

Answer 1

Calculate the fall time T at that altitude H.

H = g/2 T^2, so
T = sqrt (2H/g)

Assume there is no parachute. At 80 m, a parachute would not open in time anyway.

Multiply the "fall time" by the airplane's speed to get the distance ahead to start the drop.

Answer 2

Sorry, I figured it out!

Answer 3

Oh, thank you drwls!

Answer 4

How long will it take to drop 80 m?
80 = 4.9 t^2
solve for t, the time in the air.

How far will the plane fly in t seconds?
350 km/hr * (1 hr/3600 seconds)* 1000 m/km = 97.2 m/s

distance = speed * time
= 97.2 t