sorry but when an object falls on Earth (or elsewhere) isn't the explanation that it converts its GPE into KE, and so if GPE is relevant for KE the do we have:
GPE of static object when 10km high = GPE of moving object 1km high + KE gained in falling + GPE of gained KE at 1km high?
but the sum of the mass of the products is lower than the ingredients, so hasn't gravitational potential energy been lost? on a smaller scale is this not also the case with fusion/fission, gravitational potential energy must have been lost, or am I missing something?
Sorry, brand new here and this may be in the wrong place or very obvious. When matter and antimatter annihilate is the energy released the sum of all their potential energy? does E=MC2 only work because of the specifics of our universe, and if the universe were to contain more matter (and...