Forces with magnitudes of 45 N and 90 N act on an object at angles of 20 degrees and 115 degrees respectively, with the X-axis. Find the magnitude of the resultant of these forces.

Answer 1

convert to x-y components so they can be added:

45@20° = <42.29,15.39>
90@115° = <-38.04,81.57>
add them up to get
<4.25,96.96> = 97.05 @ 87.49°