What Angle Should a Fireman Aim the Hose to Reach the Same Height?

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To determine the angle at which a fireman must aim the hose to reach a height of 20 meters, the horizontal velocity of 12 m/s is crucial. The discussion emphasizes the need for participants to follow forum guidelines, particularly by showing their work and relevant formulas before seeking assistance. The term "projectory" is corrected to "trajectory" for clarity in the title. Properly framing the problem is essential for effective problem-solving in physics. Engaging with the community requires adherence to these guidelines for a productive discussion.
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A fireman is standing on top of a building 20m high, he wants the water from the hose to reach the burning wall at the same level above the ground as he is standing. Horizontal velocity is 12m/s. At what angle must he aim the hose relative to the horizontal?
 
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Welcome to PF!

Please take a moment to read the guidelines of PF. This looks like a homework assignment. We have a template or homework questions where you describe the problem, show relevant formulas and show your work. We can't do your homework and we can't help until you show us some work.

Lastly, I think your title should be trajectory not projectory. It helps to have descriptive titles.
 

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