Question

There are three forces acting on an object: 4N to the left, 5N to the right and 3N to the left. What is the net force acting on the object?

Answer 1

I found: `2N` to the left.

Explanation:

You have a vectorial composition of your forces:
considering "right" as positive direction you get:

Formally speaking you have the composition of three forces:
`vecF_1=(5N)veci`
`vecF_2=(-3N)veci`
`vecF_3=(-4N)veci`
Resultant:
`SigmavecF=vecF_1+vecF_2+vecF_3=(5N)veci+(-3N)veci+(-4N)veci=(-2N)veci` to the left.