Firemen are shooting a stream of water at a burning build- ing using a high-pressure hose that shoots out the water with a speed of 25.0 m/s as it leaves the end of the hose. Once it leaves the hose, the water moves in projectile motion. The firemen adjust the angle of elevation a of the hose until the water takes 3.00 s to reach a building 45.0 m away. You can ignore air resistance; assume that the end of the hose is at ground level. (a) Find the angle of elevation a. (b) Find the speed and acceleration of the water at the highest point in its trajectory. (c) How high above the ground does the water strike the building, and how fast is it moving just before it hits the building?
Firemen are shooting a stream of water at a burning build- ing using a high-pressure hose that shoots out the water with a speed of 25.0 m/s as it leaves the end of the hose. Once it leaves the hose, the water moves in projectile motion. The firemen adjust the angle of elevation a of the hose until the water takes 3.00 s to reach a building 45.0 m away. You can ignore air resistance; assume that the end of the hose is at ground level. (a) Find the angle of elevation a. (b) Find the speed and acceleration of the water at the highest point in its trajectory. (c) How high above the ground does the water strike the building, and how fast is it moving just before it hits the building?
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Transcribed Image Text:Firemen are shooting a stream of water at a burning build-
ing using a high-pressure hose that shoots out the water with a
speed of 25.0 m/s as it leaves the end of the hose. Once it leaves
the hose, the water moves in projectile motion. The firemen adjust
the angle of elevation a of the hose until the water takes 3.00 s to
reach a building 45.0 m away. You can ignore air resistance;
assume that the end of the hose is at ground level. (a) Find the
angle of elevation a. (b) Find the speed and acceleration of the water
at the highest point in its trajectory. (c) How high above the ground
does the water strike the building, and how fast is it moving just
before it hits the building?
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