Newton's third law and attraction

In summary, the force of attraction between an electron and a proton in a hydrogen atom is an example of action and reaction to which Newton's Third Law applies. This is similar to the centripetal force keeping a satellite in orbit, where the third law partner is the force with which the satellite pulls on the earth. However, in the case of electron motion in a hydrogen atom, the concept of force is moot at this scale and classical mechanics is not enough to fully understand it.
  • #1
Tulatalu
29
1
Is the force of attraction between an electron and a proton in a hydrogen atom a example of action and reaction to which Newton's 3rd law applies?
 
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  • #2
Yes it is.
 
  • #3
Tks. :D Is it the same as the centripetal force keeping a satellite in orbit and its weight?
 
  • #4
Principle action=reaction always applies. Electron motion (orbits) in a hydrogen atom must be quantized however. Classical mechanics isn't enough
 
  • #5
I would say the concept of force is a bit moot at this scale.
 
  • #6
Tulatalu said:
Tks. :D Is it the same as the centripetal force keeping a satellite in orbit and its weight?

The centripetal force keeping a satellite in orbit is its weight. The third law partner of this is the force with which the satellite pulls on the earth, keeping the Earth in its orbit about the satellite.
 
  • #7
zoki85 said:
Principle action=reaction always applies.

It doesn't apply to fictitious forces.
 

Related to Newton's third law and attraction

1. What is Newton's Third Law of Motion?

Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. This means that when an object exerts a force on another object, the second object will also exert an equal force in the opposite direction on the first object.

2. How does Newton's Third Law relate to attraction?

In terms of attraction, Newton's Third Law explains that the force of attraction between two objects is equal and opposite. For example, the Earth exerts a gravitational force on us, and we also exert a gravitational force on the Earth. This is why we are pulled towards the Earth, and the Earth is also pulled towards us.

3. Can Newton's Third Law be applied to all types of attraction?

Yes, Newton's Third Law can be applied to all types of attraction, including gravitational, magnetic, and electric. In all cases, the force of attraction between two objects is equal and opposite.

4. How does distance affect the force of attraction according to Newton's Third Law?

According to Newton's Third Law, the force of attraction between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This means that as the distance between two objects increases, the force of attraction decreases.

5. Is Newton's Third Law the only factor that affects attraction between objects?

No, there are other factors that can affect the force of attraction between objects, such as their masses, distance, and any other external forces acting on them. However, Newton's Third Law is a fundamental principle that applies to all types of attraction and is always present in these interactions.

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