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Gnoma [55]
3 years ago
8

An airplane used to drop water on brushfires is flying horizontally in a straight line at 180 mi/h at an altitude of 390 ft. Det

ermine the distance d at which the pilot should release the water so that it will hit the fire at B.
Physics
1 answer:
Arturiano [62]3 years ago
3 0

Answer:

The water should be released a distance of 1289.88 feet before the plane is on top of the bush fire.

Explanation:

Let's first find the time required for the water to fall down 390 ft onto the bush fire.

Initial Vertical Speed of water = 0

Distance to be covered = 390 ft

Acceleration due to gravity = 32.2 ft/s^2

s=u*t+\frac{1}{2} (a*t^2)

390=0*t+0.5(32.2*t^2)

t = 4.92 seconds

Thus the water should be dropped 4.92 seconds before the plane is over the bush fire. Now we can also find the distance d at which the pilot should release the water:

d = Speed of plane * time

Speed of plane = 180 / (60 * 60) = 0.05 mile/second

d = 0.05 * 4.92 = <u>0.246 miles</u>    OR    <u>1289.88 feet</u>

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Thus, the water should be released a distance of 1289.88 feet before the plane is on top of the bush fire.

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