If an object is accelerating, are there unbalanced forces acting on it?

If an object is accelerating, are there unbalanced forces acting on it?

• A. No
• B. Only gravity
• C. Only friction
• D. Yes

Answer: (D)

Acceleration happens only when the total force on an object is not zero. Newton’s second law tells us that the net force equals mass times acceleration, so a nonzero acceleration means there is a nonzero net force acting on the object. If all forces canceled out, the object would move at a constant velocity or stay at rest, with no acceleration. In everyday cases, gravity can produce acceleration if there’s nothing to fully counteract it (like a falling object), or a push can overcome friction to create a net forward force. The essential idea is that any observed acceleration signals an unbalanced, net force acting on the object.

Acceleration happens only when the total force on an object is not zero. Newton’s second law tells us that the net force equals mass times acceleration, so a nonzero acceleration means there is a nonzero net force acting on the object. If all forces canceled out, the object would move at a constant velocity or stay at rest, with no acceleration. In everyday cases, gravity can produce acceleration if there’s nothing to fully counteract it (like a falling object), or a push can overcome friction to create a net forward force. The essential idea is that any observed acceleration signals an unbalanced, net force acting on the object.