- #1
alexoftennis
- 4
- 0
Homework Statement
You are given a vector in the xy plane that has a magnitude of 85.0 units and a y component of -50.0 units
The two possibilities for its x component are +68.74 and -68.74
Assuming the x component is known to be positive, specify the vector which, if you add it to the original one would give a resultant vector that is 70.0 units long and points entirely in the -x direction.
Magnitude = ?
Direction = ? degree
Homework Equations
The Attempt at a Solution
I found that the magnitude was 147.47 by
[(-138.74)^2+(50)^2]^(1/2) or 147.47.
The problem is I can't geet the direction in degrees. I did
arcsin(50/147.47)=19.82 but that is not right.
Please help thanks!