An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity? If yes, state the conditions that must be placed on the magnitude and direction of the velocity. If no, provide a reason.

Yes, it is possible for an object to be traveling with a non-zero velocity even if it experiences a net zero external unbalanced force. This is in accordance with Newton's first law of motion, which states that an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

The conditions that must be placed on the magnitude and direction of the velocity are as follows:

1. The magnitude of the velocity (speed) must remain constant. This means that the object should not be accelerating or decelerating.

2. The direction of the velocity must also remain constant. This means that the object should be moving in a straight line.

In other words, the object must be moving with a constant velocity. This includes objects that are at rest (since zero velocity is a constant velocity).

If there were an unbalanced force acting on the object, then the object would be accelerating (which means its velocity would be changing), which contradicts our assumption of a net zero external unbalanced force.