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

In a local bar , a customer slides an empty beer mug down the counter for a refill. The bartender is just deciding to go home and rethink his life. He does not see the mug, which slides off the counter and strikes the floor 1.40m from the base of the counter. If the height of the counter is .860m. (a) with what velocity did the mug leave the counter and (b) what was the direction of the mug's velocity just before it hit the floor?

2. Relevant equations

(a) I got the correct answer for this by using the equation

yf= yi + vyit-1/2gt2

I got 3.3 m/s

(b) I would assume that since I know the height of the bar at .860m and the distance

traveled of 1.4m

3. The attempt at a solution

(b) The angle would make sense to me to be the tangent of opposite over adjcent but

I get 31.6 degrees, but from the book the answer is -50.9

Not sure what I'm doing wrong.

Thanks,

Kevin

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Non Symetrical Parabola Question

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