# Misc ideas * Slightly muddy thinking can be observed by Newton thinking purely about a "quantity of motion" and not being able to disentangle the difference between momentum and kinetic energy (pg 22, Biggest Ideas in the Universe: Space, Time, Motion) * Simplify down to the simplest possible situation that contains the essential kernel of the problem. Solve that problem. Then add the complications back in and see how they impact the answer to the simple problem (pg 27, Biggest Ideas in the Universe: Space, Time, Motion)