# Newton's 1st law; a special case?

• abrowaqas
In summary, 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. This law can be observed in everyday life, such as when a car comes to a stop or when a book remains on a table. It also applies to objects in motion, such as a ball rolling on a flat surface or a person riding a bicycle. It cannot be violated, as it is a fundamental law of physics that has been observed and tested numerous times.
abrowaqas
Why we called Newton's 1st law is a special case of Newton's 2nd Law?
what case of 2nd law is perfering here?

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?

Although Newton's 1st law might appear simply to be a special case of his 2nd law, it has also been interpreted to be Newton's definition of inertial frames of reference. To paraphrase the great man: "IF an object that experiences no external force moves with constant velocity, then that object is being viewed from an inertial frame of reference." In brief, Newton's 1st law delineates the class of reference frames in which his 2nd law applies.

## 1. What is Newton's 1st law?

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.

## 2. What is a special case of Newton's 1st law?

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.

## 3. How does Newton's 1st law relate to everyday life?

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.

## 4. What are some examples of objects in motion that follow Newton's 1st law?

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.

## 5. Can Newton's 1st law be violated?

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.

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