1. Newton's First Law of Motion (Law of Inertia):
* An object at rest will stay at rest, and an object in motion will stay in motion at a constant velocity, unless acted upon by a net force.
This means that objects tend to resist changes in their motion. For example, a ball at rest will stay at rest unless someone kicks it. A car moving at a constant speed will keep moving at that speed unless the brakes are applied, or the engine provides more power.
2. Newton's Second Law of Motion:
* The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This is often written as the equation: F = ma, where F is force, m is mass, and a is acceleration.
This means that the more force applied to an object, the faster it will accelerate. However, a heavier object will accelerate more slowly than a lighter object if the same force is applied. For example, a push on a small car will cause it to accelerate faster than a push on a large truck.
