Hi again,(adsbygoogle = window.adsbygoogle || []).push({});

My first question has to do with vectors again. But it's not hard. I just can't see my mistake.

The problem involves two displacement vectors.Awhich is 3.00km due south, andBwhich points due east. No value is given forB. However the resultant vector is 4.49km.

So of course I'm asked to findBand it's direction. So using Pythagorean's theorem of. R^2 = A^2 + B^2, I foundBto be 3.34km. Which is correct. However here comes my problem. I know the direction of the resultant is east of south, but when trying to find theta I keep getting a wrong answer. I just don't understand what I did wrong. My answer for theta was 41.9 degrees but when I submit my answer, it is wrong. Where is my mistake?

Secondly, I have a free fall question..

Here is the problem: A diver springs upward with an initial speed of 1.8 m/s from a 5.0m board.

What is the higest point he reaches above the water?

So, I would know how to solve for this if the diver jumped off of the ground. Unfortunately the diver is already 5.0m above the water so my problem is I don't know how to solve this. LOL

I tried using the equation Y = V^2 - Vo^2 / 2a but my answer couldn't possibly be correct as it wouldn't make sense.

A little help and direction for both problems would be greatly appreciated.

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# Homework Help: Vector and Free Fall Question

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