from where does energy come into a spring when one presses it and it resists the force applied?

Question

suppose u r pressing a spring, and in return it will also give a resisting force on ur hands. according to newton, energy is neither created nor destroyed, then from where does the spring get energy continuously to resist the force applied on it untill u remove ur hands.

Answer 1

You are correct to state that no energy is created nor destroyed (some energy is loss due to heat though). By your act of pushing (kinetic energy) on the spring (which has 0 kinetic energy at the moment till you push on it), you transfer your kinetic energy to the spring to give it potential energy to push back. The more you try to squish it, the more the spring tries to get back into its normal state of NO kinetic energy, a resting state.

Answer 2

The spring, like many other things, has an internal resistance to being compressed and some degree of elasticity. Exertion of the force through a distance is work done by you on the spring. Part of this work is now potential energy within the spring and part becomes heat as internal friction within the spring resisting the compression. Many rapid compressions without some heat removal would result in the spring getting quite hot.

Answer 3

I think answers above complete just one part of your question.
In the question, there are 2 scenarios : viz:
1 - Resistance when you compress press a spring
2 - Recoil action of spring.

Case 1: As you mentioned, Energy can neither be created nor destroyed. Let us assume that you are compressing a block of Iron as against spring. The force you apply is just transferred and the iron block in turn exerts the same amount of force beneath.
In case of spring, it doesn't transfer the entire force exerted by you. It transfers partial force and the rest is used to compress the spring (which in turn the spring 'stores'). Only after the Spring reaches maximum compression point, the entire force exerted is transferred beneath.
Now comes case 2
Now when you release the spring, it rebounds with the energy you used to compress.
I am no expert, but I would put that the force with which it recoils would be:
Force with which you compressed the spring 'minus' Force transferred beneath 'minus' Any other losses like heat or friction.

Answer 4

Remember Newtons 1st Law

For every action there is an equal and opposite reaction.

when u press the spring down by ur hand, the spring stores the energy as a potential energy which is converted into kintetic energy.

When u press the spring a equal n opposite force is appllied to ur hands so it resist to ur hand

Ur applying wrong law at wrong place

Answer 5

It's the potential energy that is stored in the spring. Once you release it, it becomes kinetic energy.

Answer 6

the energy source is from the pushing motion derived from the hand as it compressed the springs coil.

Answer 7

Spring steel has a memory.It tries to maintain it's shape because of this memory.When you colapse or stretch a spring, you are transfering your enery into it.When you let go of the spring, it's memory, makes it return to the position it was origonaly in.All your doing is transfering engery.

Answer 8

your hands.