You have two forces, 111.9 N and 69.6 N.
What is the magnitude of their resultant
if the ﬁrst acts upward and the second acts
downward? can somebody explain this to me
plzz

Question

You have two forces, 111.9 N and 69.6 N.
What is the magnitude of their resultant
if the ﬁrst acts upward and the second acts
downward? can somebody explain this to me
plzz

s3a · Answer

The vector sum of the vertical forces (aka y direction) is:

ΣF_y = (+119.9N + -69.6N) = +50.3 N (where the Σ means "add everything up" and the positive means upward and the negative means downward (as defined by us and most people).

Basically, all this is is two forces fighting against each other and one wins and by doing the vector sum, we figure out which one wins, by how much, and in which direction the resultant force will be pointed in.

anonymous · Answer

resultant force= total force acting
let up force be + and down force be negative
so resultant force is just the addition of the two forces.
+111.9 + (-69.6) = 111.9-69.6
     resultant force= +42.3N
so it is 42.3N upwards.