what is an example of Newton's law that every action has an equal and opposite reaction?

Question

I need examples to understand this law please.

Answer 1

Rifle kickback when a shot is fired. Let's say that the mass of the bullet is m, and its muzzle velocity v, and the mass of the rifle is M. The, the law of conservation of momentum says:

mv + MV = 0

or V = - (mv / M)

Which means the rifle will move in the opposite direction at velocity
V, until stopped by the shoulder.

Answer 2

Newton's law is not that every action has an equal and opposite reaction. Instead, as stated by Newton, "All forces occur in pairs, and these two forces are equal in magnitude and opposite in direction." He derived this from the conservation of momentum. To say it easier, you are supposed to say "for every action FORCE there is an equal but opposite reaction FORCE." However, that force, the key part of his equation, is often left off. Anyways, an example would be if you push against a wall, the wall will push back on you. You can lean against a wall and the wall and you wont fall over because it is pushing back on you. Likewise, if you drop an object, the force of gravity will not only bring that object closer to the earth, but bring the earth closer to the object (the object has gravity too, but because of its much smaller mass, the earth will move proportionally a much smaller amount than the ball did.)

Answer 3

1.) The way a cannon rolls back on those huge wheels when the ball is shot out, or a gun recoils.

2.) How those 5 silver hanging balls that click clack together move when you release them... you know how when you let one drop, it hits the hanging ones and only one on the other end goes up and comes back to start over. If you pick up 3 and drop them, the 2 hanging accept the 1st one that hits it and 3 go up, creating an equal and opposite reaction.

3.) And finally - my favorite - when you tell your kid to do something and they don't do it. lol

Answer 4

The easiest example of that of an inflated balloon.

It releases air out of the balloon directed behind it,

As a result the balloon is propelled forwards, in opposition to the air being released behind the balloon.

Answer 5

Punching somebody in the face causes their head to recoil.

Answer 6

You're probably sitting on a chair right now. You're pushing on the chair, and the chair is pushing back on you.