posted by john .
find the net force produced by a 40 newton force and a 50 newton force in each of the following cases:
both forces act in the same direction.
both forces act in opposite directions.
To find the Resultant vector in any direction,
add the magnitudes in that direction
call your direction along the + x axis, or EAST
then you have
40 East + 50 East = 90 East
40 East - 50 East = - 10 East (which is + 10 West)