3b - Solution: Resolve velocity into x and y components ! v...

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PHY2053 – Section 6168 Quiz #3 Friday, January 23, 2004 Name_______________________________ UFID___________________ Please read the problem carefully and be sure to show all of your work. Partial credit will be given. A fireman, 60.0 m away from a burning building, directs a stream of water from a ground level fire hose as an angle of 30° above the horizontal. If the speed of the stream is 45 m/s as it leaves the hose, at what height will the stream of water hit the building?
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Unformatted text preview: Solution: Resolve velocity into x and y components ! v x = v cos 30° = 45 cos 30° = 39.0 m/s ! v y = v sin 30° = 45 sin 30° = 22.5 m/s x-direction: Find time of flight ! x = v x t or t = x/ v x = 60.0/39.0 = 1.54 s y-direction: Find height of impact ! y = v y t - (1/2) g t 2 = (22.5)(1.54) – (0.5)(9.8)(1.54) 2 = 23.0 m The water hits the building at a height of 23.0 m...
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This note was uploaded on 09/25/2011 for the course PHY 2053 taught by Professor Buchler during the Spring '06 term at University of Florida.

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3b - Solution: Resolve velocity into x and y components ! v...

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