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NotionCommotion
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I take a spring and expend work to compress it with my fingers thereby increasing the potential energy of the spring. After it is at its final compressed state, am I doing work?
Once you stop compressing the spring, you stop doing mechanical work on it.NotionCommotion said:After it is at its final compressed state, am I doing work?
Sure! It takes energy for you to maintain that tension. But that's got nothing to do with the spring. You could be replaced by a rock! The rock won't get tired.NotionCommotion said:I agree, but it is a strong spring and all the work I am expending holding it compressed is getting me tired!
Not sure what you mean by "expending work". But internal to you, your muscles are doing work contracting and relaxing even when your fingers do not move the spring. You require chemical energy in order to maintain that tension on the spring with your fingers.NotionCommotion said:Expending energy or expending work? My thought is when I hold it, my muscles vibrate resulting in a force over a distance but I don't get the energy back when the spring oscillates as I act as a dampener.
My muscles are doing work and I am using chemical energy maintaining the tension on the spring, but mechanical work is not being applied to the spring?Doc Al said:But internal to you, your muscles are doing work contracting and relaxing even when your fingers do not move the spring. You require chemical energy in order to maintain that tension on the spring with your fingers.
Sounds good.NotionCommotion said:My muscles are doing work and I am using chemical energy maintaining the tension on the spring, but mechanical work is not being applied to the spring?
Where is the work performed by my muscles and the chemical energy being transferred to?Doc Al said:Sounds good.
All these goings on are within your body. It all ends up as increased internal energy ("heat").NotionCommotion said:Where is the work performed by my muscles and the chemical energy being transferred to?
Exactly.Nidum said:In each case all energy being used to produce a force against a non moving object is dissipated as heat .
No.NotionCommotion said:After compressing the spring with my fingers, I wedge my fingers between a crack in a big rock. I do this for many days until I die and decompose and obviously am no longer utilizing any chemical energy, yet still the spring is compressed. My index finger and thumb bones both have an equal and opposite force on both sides, and so does both sides of the crack in the rock.
Is something now creating heat?
The concept of work applied to a spring by finger muscles refers to the force exerted by the muscles in the fingers to compress or expand a spring. This work is measured in joules and is dependent on the force applied and the distance the spring is compressed or expanded.
The work applied to a spring by finger muscles causes the spring to compress or expand, depending on the direction of the applied force. This work is stored in the spring as potential energy, which can then be released to do work when the spring returns to its original state.
The amount of work applied to a spring by finger muscles is affected by the force applied and the distance the spring is compressed or expanded. The stiffer the spring, the more work is required to compress or expand it, and the more force applied, the more work is done.
The work applied to a spring by finger muscles can be calculated using the formula W = F * d, where W is work in joules, F is the force applied in newtons, and d is the distance the spring is compressed or expanded in meters.
Yes, the work applied to a spring by finger muscles can be converted into other forms of energy, such as kinetic energy when the spring is released and expands or compresses an object, or thermal energy when the spring experiences friction during compression or expansion.