|Sep11-07, 11:12 PM||#1|
1. The problem statement, all variables and given/known data
Each of the displacement vectors and shown in Figure P1.38 has a magnitude of 3.00 m. Find the following values graphically. Report all angles counterclockwise from the positive x axis.
(b) A - B=?
(d) A- 2B
2. Relevant equations
C=A+B C=B+A C= A+ (-B) maybe X= mcos(theta) Y=msin(theta)
3. The attempt at a solution
Ive been working on this problem for long time now, these vector properties are confusing, so far i manage to come up with some diffrent ways to get the resulant for part A but i dont know if im doing it right. first thing i try to connect A to B but extending the tail towards the head of B, then i mesuared the resultant, but got wrong answer. Same thing when I went from B to A, I dont know if connecting them right. I really need some one to shine some light on this one. When I do extend to B from A it turns out to be a Eqaultrail triangle, so the angle must be 60 deg where it meets.
|Sep11-07, 11:51 PM||#2|
If you draw the 3rd side of the triangle formed by the two sides you've drawn on the picture... ie draw a vector from the head of B to the head of A, what vector is that?
|Sep12-07, 05:26 PM||#3|
turns out with the help of a niffty program, the resultant goes straight in the middle of the two vectors when you have A+B. This forms a pallrelagram with an angle of 60 deg at the end. I figure it out for myself, but I appreicate the response. I just stay with it for whole time, but sheer luck it started fitting together. I was able to answer all the parts.
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