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

A swimmer wants to cross a river, swimming directly from point A to point B, as shown in the figure. The distance d_1 (from A to C) is 179 m, the distance d_2 (from C to B) is 137 m, and the speed v_r of the current in the river is 5.00 km/h. Suppose that the swimmer's velocity relative to the water makes an angle of 34.0 degrees with the line from A to C, as indicated in the figure.

What is the angle between the velocity vector for the swimmer with respect to a stationary observer (i.e. an observer standing at rest on the shore) and the riverbank? Hint: you should draw a triangle expressing the necessary addition of velocities for this problem.

http://session.masteringphysics.com/problemAsset/1000050755/6/M2K_rm_2_v1_001.jpg

2. Relevant equations

N/A

3. The attempt at a solution

I thought it was 56 degrees because 90-34=56 but this is wrong.

i dont even understand the question i guess. Can anyone better explain this to me? i dont get what angle i am looking for.

thank you

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# Homework Help: Crossing a river.

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