Question

choose the correct answer. when does motion (or a change in motion) of an object happen? when forces are unbalanced when forces are balanced

Explanation:

According to Newton's laws of motion, balanced forces (net force = 0) result in an object remaining at rest or moving at a constant velocity (no change in motion). Unbalanced forces (net force ≠ 0) cause a change in an object's motion (acceleration, change in speed or direction). So motion or a change in motion occurs when forces are unbalanced.

Answer:

when forces are unbalanced