This document summarizes Newton's three laws of motion. Newton's first law states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by an external force. Newton's second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Newton's third law states that for every action, there is an equal and opposite reaction. This law explains how rockets produce thrust and keeps planets in orbit around the sun through gravitational forces.

1. 8 th Grade Chapter 3 Lesson 3 Pgs. 112- 114 For Student Use Only

2. Newton’s Laws Law 1: (Review) Inertia applied= An object at rest stays at rest and an object in motion stays in motion until acted upon by another force. Law 2: The acceleration of an object is directly related to the force and inversely related to the object’s mass. Acceleration= Force/Mass Force=mass x acceleration

3. Newton’s Laws Law 2 Explained: The force necessary to move an object is equal to the object’s mass times its acceleration. 1 Newton applied to 1kg accelerates the mass at 1m/s 2 Law 3: For every action there is an equal and opposite reaction

4. Newton’s Laws Law 3: When one object applies force on an object the opposite object applies equal force back. This principle is used in rockets and produces the thrust of rockets.

5. Newton’s Laws Circular Motion: Centripetal Force Defined as: Any force that causes an object to travel in a curved path rather than a straight line Seeking center Centrifugal Force The inertia of the ball causing a pull on the string Seeking outside from center

6. Newton’s Laws Newton’s 3 rd Law: This law also keeps the planets in orbit. Gravity is the string that keeps the planets in line.