According to Newton's Second Law, what happens when an unbalanced net force acts on an object?

• A. The object accelerates in the direction of the net force, with magnitude given by $a=\frac{F}{m}$.
• B. The object moves at constant velocity even though the net force is not zero.
• C. The object accelerates only if its velocity is initially zero; otherwise it continues unchanged.
• D. The object remains at rest regardless of the net force because inertia prevents any change in motion.

Answer: (A)