Storing Energy in a Rubber Band: Does Mass Increase?

In summary, stretching a rubber band or charging a battery adds potential energy, which can equate to a slight increase in mass. It is a good exercise to calculate the exact amount of mass increase in these scenarios.
  • #1
deadcat
26
1
Does this mean if I had a rubber band and weighed it, then stretched and weighed it while being stretched out, that it would weigh more at that time? Since at that time it has stored energy, which equates to mass?
 
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  • #2
Yes, that is what it means. And a charged battery will weigh slightly more than discharged battery, and so forth.

It is a worthwhile exercise to calculate just how much mass increase we're talking about... Try it!
 
  • #3
Nugatory said:
Yes, that is what it means.

If you stretch out a rubber band the energy is converted into elastic potential energy. The fact that the rubber band is stretched out proves that the vast majority of the energy cannot go anywhere else, eg. mass.
 

1. What is the concept of storing energy in a rubber band?

The concept of storing energy in a rubber band involves stretching the rubber band, which causes it to store elastic potential energy. This energy is then released when the rubber band is allowed to return to its original, unstretched state.

2. How does the mass of a rubber band affect its ability to store energy?

The mass of a rubber band does not directly affect its ability to store energy. However, a heavier rubber band may require more force to stretch and therefore, more energy to be stored in it.

3. Does the mass of an object attached to a rubber band affect its ability to store energy?

Yes, the mass of an object attached to a rubber band does affect its ability to store energy. The heavier the object, the more energy will be required to stretch the rubber band and the more potential energy will be stored in it.

4. Can a rubber band store an unlimited amount of energy?

No, a rubber band has a limit to how much energy it can store. This limit is known as its elastic limit. Once the elastic limit is reached, the rubber band will either break or lose its ability to return to its original state, making it unable to store any more energy.

5. Why is it important to consider the mass of an object when storing energy in a rubber band?

Considering the mass of an object is important because it affects the amount of energy that can be stored in the rubber band. If an object is too heavy, it may cause the rubber band to exceed its elastic limit, which can result in the rubber band breaking or losing its ability to store energy.

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