Recent content by Morton

So what is momentum after all? What's the different between momentum and kinetic energy? Both of them only involve m and v, why do they turn out to be different?

The original planetary model of the electron orbiting the nuclear did not make any sense because the electron would lose its energy so quickly and the atom would collapse within a tenth of a second. But I can not see an obvious reason why electron loses its energy while its orbiting the nulear...

I know the totoal momentum and the total energy is conserved during the collision. And total energy is equal to the internal energy and the kinetic energy of the object. But I still can not see the internal energy from the formulea which only involve m and v. For me, it seems that if mv is...