What is "if the net force on an object is zero?

If the net force on an object is zero, it means that all the forces acting on the object are balanced and cancel each other out. In other words, the total force acting on the object is equal to zero.

When the net force on an object is zero, the object will either remain at rest or continue to move at a constant velocity in a straight line according to Newton's First Law of Motion.

This concept is known as equilibrium, where the forces are balanced and the object is not accelerating in any direction.

In real-world applications, objects can experience zero net force in various situations, such as when an object is suspended in mid-air, or when a car is traveling at a constant speed on a flat road.