- #1
sameeralord
- 662
- 3
Hello everyone,
Ok I'm no longer worried about why Newton's third law is occurring. Doc Al advised me in the last thread to look at some action reaction pairs instead, and I think that is what I needed to do. Ok I'm having difficulty understanding Newton's third law when two objects are always in contact with each other.
Eg: There is an elastic spring attached to a wall and I try to compress it using my hand. My hand is always in contact with the spring.
Now my hand applies a force of let's say 10 N on the spring. Then spring applies the same force on me. Now these are the questions I have.
1.Why am I not moving back due to springs reaction force? Is it because due to friction of the ground, the net force acting on me is 0.
2.Now after I compress the spring for a bit, I can no longer compress? This means that my 10 N force must be balanced? If this is due to elasticity of the spring, does it build up as I push further.
3. Now this is my most important question. If the spring didn't have an elastic property does that mean, I would be able to compress it right up to the wall, with no problem. So let's say I was only able to compress a spring halfway with a 10 N force, then I suddenly supplied a bigger force and it caused the spring to lose its elasticity, does this mean that from now on the resistance force(elastic force is zero).
Thank you very much
Ok I'm no longer worried about why Newton's third law is occurring. Doc Al advised me in the last thread to look at some action reaction pairs instead, and I think that is what I needed to do. Ok I'm having difficulty understanding Newton's third law when two objects are always in contact with each other.
Eg: There is an elastic spring attached to a wall and I try to compress it using my hand. My hand is always in contact with the spring.
Now my hand applies a force of let's say 10 N on the spring. Then spring applies the same force on me. Now these are the questions I have.
1.Why am I not moving back due to springs reaction force? Is it because due to friction of the ground, the net force acting on me is 0.
2.Now after I compress the spring for a bit, I can no longer compress? This means that my 10 N force must be balanced? If this is due to elasticity of the spring, does it build up as I push further.
3. Now this is my most important question. If the spring didn't have an elastic property does that mean, I would be able to compress it right up to the wall, with no problem. So let's say I was only able to compress a spring halfway with a 10 N force, then I suddenly supplied a bigger force and it caused the spring to lose its elasticity, does this mean that from now on the resistance force(elastic force is zero).
Thank you very much
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