abrowaqas said:Why we called Newton's 1st law is a special case of Newton's 2nd Law?
what case of 2nd law is perfering here?
Newton's 1st law, also known as the law of inertia, states that an object at rest will remain at rest and an object in motion will remain in motion with a constant velocity unless acted upon by a net external force.
The special case of Newton's 1st law occurs when there is no net external force acting on an object. This means that the object will either remain at rest or continue to move in a straight line with a constant speed.
Newton's 1st law is observed in everyday life, such as when a car comes to a stop when the brakes are applied or when a book remains on a table unless someone pushes it off. It explains why objects tend to maintain their state of motion unless acted upon by an external force.
Some examples of objects in motion that follow Newton's 1st law include a ball rolling on a flat surface, a spacecraft traveling through space, and a person riding a bicycle at a constant speed.
No, Newton's 1st law cannot be violated. It is a fundamental law of physics that has been observed and tested numerous times. If an object appears to be violating this law, it is likely due to the presence of an external force that is not being considered.