Question

prove that newtons second law of motion contain both first and third law?

Answer 1

Every physics student learns Newton's three laws of motion. It's tempting to consider that these are three separate and independent laws. That's not so. Both the first and third laws may be mathematically derived from the second law, as we will show.

The fact that the first law may be derived from the second has long been known. The second law,Fnet=ma, tells us that the net (vector sum) of all forces acting on a body is equal to the product of the body's mass and its vector acceleration. When the acceleration is zero, the net force must be zero. This is exactly the content of the first law.

Let's first consider the case of two bodies in contact. Each exerts a force on the other at the interface, or point of contact, where the bodies touch. If that point or interface is treated as a "body" of mass zero, then Newton's second law tells us thatFnet=0a, soFnet= 0. So the net force on a body of zero mass is always zero, whatever forces act upon it. Therefore if only two forces act on a body, they must add to zero, and therefore must be equal size and oppositely directed. This establishes Newton's third law.

hence proved.

Answer 2

The second law of Newtown"s law/s of motion, the speed and the increasing speed of an object at free fall, and the computation of the separation, shot, thickness and volume and weight of the free-falling object.

The third comes after the second.

This is a relationship. There are numerous all the more so requesting "the" relationship resembles requesting the connection between the left and the right hand. They are utilized together in such a significant number of ways.

Newton's second law of motion speaks just of power following up on an object. the third law speaks about the response and additionally the force causing the response.