Yes, it is possible for an object to be moving with a non-zero velocity when experiencing a net zero external unbalanced force. The conditions for this to occur are: the object must be already moving with a constant velocity (meaning constant speed and direction). This is because, according to Newton’s first law of motion (inertia), an object in motion will continue moving at a constant velocity unless acted upon by an external unbalanced force.
Here’s a more detailed explanation:
Newton’s First Law (Inertia):
This law states that an object in motion will stay in motion with the same velocity (constant speed and direction) unless a net external force acts upon it.
Zero Net Force and Constant Velocity:
If the net force on an object is zero, it means the forces acting on the object are balanced, and there’s no change in the object’s state of motion. This implies that if the object is already moving at a constant velocity, it will continue moving at that same constant velocity.
Example:
Imagine a puck on a perfectly frictionless ice surface. If you give it an initial push, it will continue moving at a constant speed and in a straight line (ignoring any external factors like air resistance), even without any further force being applied.