(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Suppose the water at the top of Niagara Falls has a horizontal speed of 2.7 m/s just before it cascades over the edge of the falls. At what vertical distance below the edge does the velocity vector of the water point downward at a 75° angle below the horizontal?

x direction

a = 0 m/s

v_{0x}= 2.7 m/s

v_{fx}= 2.7 m/s

x = ?

y direction

a_{y}= -9.80 m/s^{2}

v_{0y}= 0 m/s

v_{fy}= ?

y = ?

Other Info

Angle = 75 degrees below horizontal

t = ?

2. Relevant equations

Newton's laws of motion...but I'm not exactly sure which ones as it appears there are two variables missing from each one.

3. The attempt at a solution

I'm studying for my final this Friday. This question plagued me at the beginning of the term, I never got it. The class moved on, and so did I. But I'm looking at it again and am determined to get it, but am still drawing a blank.

I'd like to findtas that would help significantly, but each equation that I've considered with it has another unknown variable as well.

Kind of flustered...

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# Homework Help: Projectile Motion - Niagra Falls

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