posted by Elyse .
Three forces with magnitudes 75 pound, 100 lb, and 125 pound act on an object at angles of 30 degrees, -45 degrees, and 120 degrees respectively. Find the direction and magnitude of the resultant vector.
convert each to (x,y) coordinates
add them up
convert result back to speed and direction
75 @ 30° = (64.95,37.50)