Physics for IGCSE & O level - Forces And Motion (Section 10 - No. 14)
What happens to an object's motion if the net force acting on it is zero?
The object stops immediately.
The object's speed will decrease.
The object's velocity is constant.
The object will change direction.
คำอธิบาย
If net force is zero then there is no acceleration, meaning the object's velocity is constant.