Physics for IGCSE & O level - Forces And Motion (Section 10 - No. 12)
If the forces acting on an object are balanced, what is the object's motion?
The object accelerates.
The object remains at rest or moves at a constant velocity.
The object changes direction.
The object decelerates.
Giải thích
When forces are balanced, the object's acceleration is zero, meaning it either stays at rest or moves at a constant velocity.