Newton’s third law states that for every action there is an equal and opposite reaction. For example if you sit in a chair your body exerts a force on the chair and the chair exerts an opposite force upward onto you.These actions are inversely related.This pair is called an interaction pair. This law is basically stating that for everything you do, there is a pair of action and reaction forces on the two objects that it pertains to. The force is on the first object is always opposite from the force on the second object. Forces are never alone. Forces are always in pairs.
Examples of Newton’s third law are everywhere. When a guy shoots a shotgun and hits a duck in the air, the recoil that the guy feels after he has fired the shot has the same magnitude as the force that the bullet was shot at. The recoil is the reaction force and the bullet being shot is the action force. Because he fired forward, the gun recoils backwards. The bullet pushes forward on the air and the air pushes backward on the bullet.Another example of Newton’s first law is when a fireman is putting out a fire with a huge fire hose. The water is coming out with a strong force and the fireman is feeling a force that is equal to the force of the water coming out. The water coming out is the action force and the fireman being forced backwards is the reaction force. The water pushes outward and the hose pushes inward on the person. When birds fly they use their wings. The birds push the air with their wings when their wings push downwards, so the air is pushing the bird up. The size of the force that the bird is pushing down on the air is the same size of the force that the air is pushing up on the bird to make him fly. The bird's wings exerts a downward force on the air as the air exerts an upward force on the wings. |
When I push forward upon the wall, the wall pushes backwards against me with the same amount of force that I put on to it. It’s stated that in Newton’s third law that when a force is acted on an object, it exerts an equal and opposite force back on to the other object. I am the first object and the wall is the second object.
Newton’s first law applies to everything. When I do something as little as sitting on a bench Newton’s third law applies. When I sit on the bench I apply a force onto it. The bench applies a force that is equal and opposite of the force that I put on it. This is the reason why I am staying in place and not accelerating.
Newton’s third law doesn’t just apply to two objects acting upon each other; there is no limit to how many objects there are, every object has an action and reaction pair. When I hold one band in one hand and a separate band in the other hand, and both bands and each tied around two other objects there are many action and reaction pairs. When I pull left on the band I pull with a force and the shower handle that is holding the band is pulling to right with an equal and opposite force. When I pull to the right with a force the towel rack that the band is being held has an equal and opposite for acting upon it that its going toward the left.
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