Which best explains parallel forces? check all that apply.
left and right forces that can be added together
right and upward forces that cancel each other out
upward and downward forces that can be added together
left and downward forces that cancel each other out
addition of parallel forces that cannot result in a negative force
differences in parallel forces that result in a net force of zero

A) left and right forces that can be added together

C) upward and downward forces that can be added together

{Just took the quiz, thee are the correct answer's)

Left and right forces can be added together

Upward and downward forces can be added together

Explanation:

The easiest logic to use is to think about it as a game of tug-of-war. If there are two people pulling from either side (we can say left is negative, and right is positive) adding the forces together, will give you a resultant force of either less than zero, more than zero, or zero.

The same logic can be applied to vertical forces. If up is taken as positive, and down is take as negative, then adding those forces together will give an overall resultant force.

your answer would be a. 12.5 kg