Introduction:
When an object experiences a net non-zero force, it means that there is an unbalanced force acting on the object. In such cases, the object will not travel with a constant speed in a straight line. To understand why this happens, let's delve into the concept of forces and their effects on motion.

Newton's First Law of Motion:
According to Newton's First Law of Motion, an object at rest will stay at rest, and an object in motion will continue moving at a constant velocity in a straight line unless acted upon by an external force. This law is also known as the law of inertia.

Effects of Net Non-Zero Force:
When an object experiences a net non-zero force, it means that the forces acting on the object are not balanced. Consequently, the object will accelerate or decelerate, changing its velocity and thus its speed.

Acceleration:
Acceleration is defined as the rate of change of velocity with respect to time. When a net non-zero force acts on an object, it causes acceleration in the direction of the force. Acceleration can be positive or negative, depending on whether the force is in the same direction as the object's motion or opposite to it.

Changing Speed:
Since acceleration is directly proportional to force, a net force will cause a change in speed. If the force acts in the same direction as the object's motion, it will increase the speed. Conversely, if the force acts in the opposite direction, it will decrease the speed.

Constant Speed:
For an object to travel with a constant speed, there must be a balance of forces acting on it. In other words, the net force must be zero. If the net force is non-zero, the object's speed will change, and it will not be able to maintain a constant speed.

Conclusion:
In conclusion, when an object experiences a net non-zero force, it cannot travel with a constant speed in a straight line. The unbalanced forces will cause acceleration, leading to a change in velocity and speed. To maintain a constant speed, the object must experience a net force of zero, where all forces acting on it are balanced.

I don't think so