What You Need To Know
Inertia is a property of matter (BILL,BILL,BILL, BILL, BILL). It states that an object will remain at rest or moving in a straight line unless acted upon by another force.
Force is all around us, a world without motion would not be possible. So here's what you need to understand. Newton was the guy everyone knows as being hit on the head by a falling apple. He then started wondering why and created the First Law of Motion. The first law of motion states that an object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced object.