Question

when a force acts on an object, the motion of the object ________. always changes. never changes. sometimes changes.

Explanation:

According to Newton's second law of motion, \(F = ma\). When a force \(F\) acts on an object (mass \(m\) is non - zero), there will be an acceleration \(a\). Acceleration means a change in velocity (either in magnitude or direction or both). So the motion (which is related to velocity) of the object always changes when a force acts on it (assuming the force is the net force and the mass of the object is constant and non - zero).

Answer:

always changes.