Question

which best explains parallel forces? left and right forces that can be added together right and upward forces that cancel each other out addition of parallel forces that cannot result in a negative force left and downward forces that cancel each other out

Explanation:

Parallel forces act in the same or opposite directions along parallel lines. Left and right forces that can be added together are an example of parallel - forces. Forces in the same direction are added together. Right and upward forces are not parallel as they are perpendicular. The addition of parallel forces can result in a negative force if the forces are in opposite directions and the larger force has a negative - assigned direction. Left and downward forces are perpendicular, not parallel.

Answer:

left and right forces that can be added together