Finding the normal force in planar non-uniform circular motion using polar coordinates
We find an expression for the normal force on a mass which is in planar non-uniform circular motion using polar coordinates.
Leibniz
Energy is neither fundamental nor conserved
Sometimes you may have heard someone say that, ‘in the end, everything is energy. Einstein himself said that mass equals energy, we are energy ourselves, light is energy, and everything in this universe is energy.’ Often, it is represented as the fundamental substance everything is made out of. And energy is conserved. Both statements are incorrect.