- #1
scottzilla
- 6
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Homework Statement
A person follows the path outlined below. 100m east, then 300m south then 150m 30 degrees south of west, then 200m 60 degrees north of east.
Homework Equations
I used component vectoring and have not been coming up with the resultant answer that the instructor has outlined.
The Attempt at a Solution
I label each vector as A, B, C, and D. Then figure the components of each: Ax=100 Ay=0, Bx=0 By=-300, Cx-129.9 Cy=-75, and Dx=-100 and Dy 173.2. This gives me Rx- -129.9 and Ry= 201.8. I then use pythagorean theorum to do radicand (-129.9 squared)+(-201.8 squared) which gives me 154.4. Yet ther instructor shows his answer as 240. I also then do angle theta =Tan-1(-201.8/-129.9) which gives me tan-1(1.553) wihch gives me the answer 57.2, but the instructor gives me the answer 237 degrees.
Any help would be greatly appreciated as I feel I am getting hte hang of it except for this type of question.
Thanks in advance,
Scottzilla