1st Law

Something that is moving (or not moving), will stay moving (or not moving), unless it is stopped (or moved) by another force.

The balls will not move, unless someone or something makes them move.

This ice skater will keep skating unless she uses friction to stop or something else stops her. (Ex: She falls 😂)

This cat is not going to move (or wake up) unless he is moved (or woken up) by someone or something.