This discussion will not be about philosphy. This law is a litte confusing but it is very fascinating so pay close attention. This law is applicable only to forces and force is a push or a pull, it is what causes acceleration or change in velocity or speed, the change could be from 0 to 1 or from 2 to 3, accelaration is simply final minus initial ie. It can give some velocity to a body at rest or increase or decrease the velocity of a body in motion, makes no difference.
So now let's get right into Newton' s third law of motion, so you can only feel a force when it is applied to you, okay? So when you push a wall with your hands, how are you able to feel the wall? It is because of Newton' s third law of motion, the wall also applies force on your hands and you are able to feel it. So what it basically means is that, "all forces occur in pairs" another very common way of saying it is "every action has it' s equal and opposite reaction" the amout of force applied on your hands is same as the amount of force your hands apply on the wall. Here it be kept in mind that the words action and reaction only refer to forces.
Newton' s third law actually stems from the nature of forces, to understand imagine two electrons, both of electrons will be repelled from eachother, this is also how two protons will interact, here it can be seen the forces occur in pairs. Now let' s imagine an electron and a proton both of them will he attacted towards eachother, here too the forces occur in pairs.
Our bodies and the wall are basically made of electrons and protons so Newton' s third law of motion is also applicable to our hands and the wall.
Look at how both sun and earth attract eachother, the forces occur in pairs, a pen and the earth also attract eachother but the earth is just too heavy and we are not able to see anything, but the pen actually makes the earth towards itself.
Now let' s take another example, when a moving car M hits a car at rest R, what happens? R starts moving and there is a decrease in the velocity of M, it is because both M and R applied force towards eachother, the force that was applied by R is opposite in direction to the force that was applied by M. From this example you can also see that this law relates to conservation of momentum and conservation of kinectic energies, the decrease in momentum and kinectic energy of M is taken by R.
Now let' s take another example, what happens when you slap someone on the cheeks? What' s the wisdom in slapping? Shouldn't your hands feel the same amount of force because of Newton' s third law of motion, here, the trick is that hands are strong, and the cheeks are weak that is why you feel less pain in the hand. To clear any doubts let' s take the example of slapping a needle, what happens now? And what happens when you punch a wall.
Note: It often becomes a little confusing to imagine what is going on in physics, as our imagination tends to think of the real world where there is friction and other things, so what we are taught in physics doesn't really happen in the real world. But physics can help you understand things and it is important to start with the basics at an elementary level, for eg: when you are trying to push a wall, your forces doesn't change anything' s velocity, the wall doesn't move, because the wall is attached to earth so effectively you are trying to push the earth and also yourself, so nothing really happens. The forces are balanced. For a wall that is not attached to the ground by cement, could effectively be attached to it by friction.
Hopefully, it was of some help.
-Syed Moris
Click here to read about Unitary system and it' a etymology
So now let's get right into Newton' s third law of motion, so you can only feel a force when it is applied to you, okay? So when you push a wall with your hands, how are you able to feel the wall? It is because of Newton' s third law of motion, the wall also applies force on your hands and you are able to feel it. So what it basically means is that, "all forces occur in pairs" another very common way of saying it is "every action has it' s equal and opposite reaction" the amout of force applied on your hands is same as the amount of force your hands apply on the wall. Here it be kept in mind that the words action and reaction only refer to forces.
Newton' s third law actually stems from the nature of forces, to understand imagine two electrons, both of electrons will be repelled from eachother, this is also how two protons will interact, here it can be seen the forces occur in pairs. Now let' s imagine an electron and a proton both of them will he attacted towards eachother, here too the forces occur in pairs.
Our bodies and the wall are basically made of electrons and protons so Newton' s third law of motion is also applicable to our hands and the wall.
Look at how both sun and earth attract eachother, the forces occur in pairs, a pen and the earth also attract eachother but the earth is just too heavy and we are not able to see anything, but the pen actually makes the earth towards itself.
Now let' s take another example, when a moving car M hits a car at rest R, what happens? R starts moving and there is a decrease in the velocity of M, it is because both M and R applied force towards eachother, the force that was applied by R is opposite in direction to the force that was applied by M. From this example you can also see that this law relates to conservation of momentum and conservation of kinectic energies, the decrease in momentum and kinectic energy of M is taken by R.
Now let' s take another example, what happens when you slap someone on the cheeks? What' s the wisdom in slapping? Shouldn't your hands feel the same amount of force because of Newton' s third law of motion, here, the trick is that hands are strong, and the cheeks are weak that is why you feel less pain in the hand. To clear any doubts let' s take the example of slapping a needle, what happens now? And what happens when you punch a wall.
Note: It often becomes a little confusing to imagine what is going on in physics, as our imagination tends to think of the real world where there is friction and other things, so what we are taught in physics doesn't really happen in the real world. But physics can help you understand things and it is important to start with the basics at an elementary level, for eg: when you are trying to push a wall, your forces doesn't change anything' s velocity, the wall doesn't move, because the wall is attached to earth so effectively you are trying to push the earth and also yourself, so nothing really happens. The forces are balanced. For a wall that is not attached to the ground by cement, could effectively be attached to it by friction.
Hopefully, it was of some help.
-Syed Moris
Click here to read about Unitary system and it' a etymology
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