* Newton's First Law of Motion: This law states that an object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
* Inertia: Objects have a tendency to resist changes in their motion. If an object is already moving, it will continue moving at a constant velocity (same speed and direction) unless a force acts upon it to change that motion.
Example:
Imagine a hockey puck sliding across a frictionless surface. Once the puck is given an initial push, there's no net force acting on it (neglecting air resistance). The puck will continue to slide at a constant speed in a straight line, even though the net force is zero.
Important Note:
While an object can be moving with zero net force, it cannot be accelerating with zero net force. Newton's Second Law states that the acceleration of an object is directly proportional to the net force acting on it. If the net force is zero, the acceleration must also be zero. This means the object's velocity will remain constant.
