470. assignment (fireman-projectile motion)

Firemen are shooting a stream of water at a burning building 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 ? 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.

 

Part A

Find the angle of elevation ? .

 

Part B

Find the speed of the water at the highest point in its trajectory

 

Part C

Find the magnitude of the acceleration of the water at the highest point in its

trajectory.

 

Part D

How high above the ground does the water strike the building?

 

Part E

How fast is it moving just before it hits the building?

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