Can anyone write summary (about 100-200 words) about Newton's Third Law ?

Question

I totally don't get it, can you use easy language ?
Thanks :)

Answer 1

Newton's Third Law essentially says that if an object exerts a force on another object, it feels an equal (just as strong) and opposite (in the opposite direction) force. So for instance, have you ever been hunting? When you fire the gun, it's exerting a force on the bullet, pushing it away from you. The bullet pushes back on the gun with the same force, causing it to "kick" against your shoulder. The reason the gun isn't moving as fast as the bullet is because it's far more massive, so the same force causes a smaler acceleration.

Answer 2

Here you are :

Newton's 3rd law may be formally stated:

"Forces always occur in pairs. If object A exerts a force F on object B,
then object B exerts an equal and opposite force –F on object A"

or in slogan style:
"Every action has an equal and opposite reaction"

Note the important provision: two objects must be involved! There exists a whole set of situations where two equal and opposite forces act on the same object, canceling each other so that no acceleration (or even no motion) occurs. This is not an example of the third law, but of equilibrium between forces. Some examples:
• A heavy object stands on the floor, pulled down by the Earth with a force mg (drawing). However, it does not move in that direction, because the floor stops it. Obviously, the floor is exerting on it an equal and opposite force -mg (velocity v=0, acceleration a=0).
• An elevator is pulled up from the street level to the 5th floor. It senses two forces: downwards, its weight and that of the people in it, and upwards the pull of the cable which holds it up. Between the floors, as long as the elevator does not accelerate, the net force must be zero, hence the two forces must be equal and opposite (v>0, a=0).

Answer 3

for every action there is an equal and opposite reaction
this is the statement of newton's third law

All forces occur in pairs, and these two forces are equal in magnitude and opposite in direction.

What Newton's third law of motion is basically saying: "For every action there is an equal, yet opposite, reaction."

The third law follows mathematically from the law of conservation of momentum.

As shown in the diagram opposite, the skaters' forces on each other are equal in magnitude, and opposite in direction. Although the forces are equal, the accelerations are not: the less massive skater will have a greater acceleration due to Newton's second law.

If a basketball hits the ground, the basketball's force on the Earth is the same as Earth's force on the basketball. However, due to the ball's much smaller mass, Newton's second law predicts that its acceleration will be much greater than that of the Earth. Not only do planets accelerate toward stars, but stars also accelerate toward planets.

The two forces in Newton's third law are of the same type, e.g., if the road exerts a forward frictional force on an accelerating car's tires, then it is also a frictional force that Newton's third law predicts for the tires pushing backward on the road.

The Law's meanings: There are no single, isolated forces in nature. A force is an interaction between two objects.

Answer 4

Newton's Laws of Motion are three physical laws which provide relationships between the forces acting on a body and the motion of the body, first formulated by Sir Isaac Newton. Newton's laws were first published in his work Philosophiae Naturalis Principia Mathematica (1687). The laws form the basis for classical mechanics. Newton used them to explain many results concerning the motion of physical objects. In the third volume of the text, he showed that the laws of motion, combined with his law of universal gravitation, explained Kepler's laws of planetary motion.

Third law:
To every action (force applied) there is an equal but opposite reaction (equal force applied in the opposite direction).
Another way of stating Newton's third law, an interaction between two objects, is that, if object A exerts a force on object B, object B will exert the same magnitude force on A, but in the opposite direction.

What Newton's third law of motion is basically saying: "For every action there is an equal, yet opposite, reaction."

The third law follows mathematically from the law of conservation of momentum.

As shown in the diagram opposite, the skaters' forces on each other are equal in magnitude, and opposite in direction. Although the forces are equal, the accelerations are not: the less massive skater will have a greater acceleration due to Newton's second law.

If a basketball hits the ground, the basketball's force on the Earth is the same as Earth's force on the basketball. However, due to the ball's much smaller mass, Newton's second law predicts that its acceleration will be much greater than that of the Earth. Not only do planets accelerate toward stars, but stars also accelerate toward planets.

The two forces in Newton's third law are of the same type, e.g., if the road exerts a forward frictional force on an accelerating car's tires, then it is also a frictional force that Newton's third law predicts for the tires pushing backward on the road.

The Law's meanings: There are no single, isolated forces in nature. A force is an interaction between two objects.
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