Energy Talk!

~Fefi~ asked:


How are the laws of conservation of momentum and energy similar?

Here are the formulas:

Law of conservation of momentum:

P1 + P2= P1′ P2′

m1 v2 + m2 v2 = m1′ v1′ + m2′ v2′

Law of conservation of Energy:

KEi + PEi = KEf + PEf
I think that the energy can’t be created nor distroyed but it can be transformed from one form to another.
But is that the similarity???

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3 Responses to “How are the Laws of conservation of Energy and Momentum similar?”

1. § DM Says:
   October 9th, 2007 at 4:41 am

   Well they all state that energy is not created nor destroyed.

2. emily Says:
   October 12th, 2007 at 6:26 am

   well. in both of the laws, they state that energy/momentum is never in any circumstance destroyed, they’re only transferred from one form/ object to another. Each side of the equations are equal.

3. kennyk Says:
   October 13th, 2007 at 4:05 pm

   They are both derived from Newton’s 2nd Law: F=ma.

   Intigrating with respect to time F=ma becomes conservation of momentum. Integrating a second time yields conservation of energy.