Can someone please explain what Newtons 3 laws mean? i don't understand the text book definition.

I think you'll understand this explanation.

http://www.physics4kids.com/files/motion_laws.html

Certainly! Newton's three laws of motion are fundamental principles in physics that describe the relationship between an object and the forces acting upon it. Here's an explanation of each law in simple terms:

1. Newton's First Law (Law of Inertia): An object at rest will remain at rest, and an object in motion will continue moving at a constant velocity, unless acted upon by an external force. Essentially, this law states that objects tend to resist changes in their motion. For example, if you slide a book on a desk, it eventually stops due to frictional forces.

2. Newton's Second Law (Law of Acceleration): The acceleration of an object is directly proportional to the net force applied and inversely proportional to its mass. In simpler words, the more force you apply to an object, the greater its acceleration will be. Additionally, heavier objects require more force to accelerate than lighter objects. The relationship can be mathematically expressed as F = ma, where F is the net force, m is the mass of the object, and a is the resulting acceleration.

3. Newton's Third Law (Law of Action-Reaction): For every action, there is an equal and opposite reaction. This law states that all forces occur in pairs: if one object exerts a force on a second object, the second object exerts an equal but opposite force on the first object. For example, when you walk on the ground, your foot exerts a force backward, and the ground exerts an equal and opposite force forward, propelling you forward.

Understanding these laws may require some additional examples and practice problems. I recommend trying some physics simulations or working through textbook examples to fully grasp the concepts.