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riddler5280
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Is included in the second law? Give reasons with examples.
becko said:In the modern view, we take the first law as the definition of inertial frames of reference.
becko said:But, why not take the second? We could define an inertial frame of reference as a frame in which the second law holds.
becko said:See my post here:
https://www.physicsforums.com/showthread.php?t=165317
becko said:Consider a particle whose position is given by a function of time x=f(t). Suppose that this function is not differentiable (imagine a particle that teleports from one place to another, making the function f(t) discontinuous). Since the second derivative of f(t) is not defined, the second law would tell us nothing about the motion of the particle.
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 continue in motion at a constant speed and direction, unless acted upon by an external force.
Newton's 1st Law deals with the concept of inertia, while the 2nd Law deals with the relationship between an object's mass, acceleration, and force.
Inertia is the tendency of an object to resist changes in its state of motion. Newton's 1st Law explains that this resistance to change is due to the object's mass and the absence of external forces.
A few examples of Newton's 1st Law in action include a book remaining on a table until pushed, a ball rolling down a hill until it reaches a stop, and a person's body moving forward when a car suddenly stops.
Newton's 1st Law provides the foundation for understanding how objects behave in motion. It explains why objects move the way they do and why they resist changes in their motion. Without this law, we would not have a fundamental understanding of motion and its principles.