When a motor vehicle is moving on a circle with a uniform speed, it experiences a net acceleration. The correct answer to this question is option 4 - the net acceleration is perpendicular to the radius and along the velocity.

To understand this, let`s break down each option:

Option 1: If the net acceleration of the vehicle was zero, it means there would be no change in velocity or direction. However, in this case, the vehicle is moving in a circle, which means it is constantly changing direction. Therefore, option 1 is not correct.

Option 2: If the net acceleration was towards the center of the circle, it would mean that the vehicle is slowing down or decelerating. However, in the question, it is stated that the vehicle is moving with a uniform speed, which means there is no change in speed. Therefore, option 2 is not correct.

Option 3: If the net acceleration was away from the center along the radius of the circle, it would mean that the vehicle is accelerating away from the center. Again, this would result in a change in speed, which contradicts the given information. Therefore, option 3 is not correct.

Option 4: This option correctly states that the net acceleration is perpendicular to the radius