E=MC^2 Question

  • Thread starter deadcat
  • Start date
  • #1
26
0
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?
 

Answers and Replies

  • #2
Nugatory
Mentor
13,033
5,760
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
TheDemx27
Gold Member
170
13
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.
 

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