Answer to Question #138797 in Physics for pepega

Question

what happens to the 5 pesos stack coins when you hit the coin at the bottom?
why is this so?
how is this related to inertia

Answer 1

If you quickly hit the coin at the bottom, the other coins above the one you hit will remain almost at their places because according to Newton's first law, all bodies want to keep their state of rest or uniform motion along a straight line. Since you impacted only one coin, all other coins almost do not move.

Newton's first law exists and works because bodies with mass have inertia - a property to keep the state of rest or state of uniform motion.