Newton's Laws of Motion

By: Trenton J. Jorgensen

Newton's 1st Law of Motion

Newton's First Law is also known as the "Law of Inertia". Inertia is the tendency of an object to resist any change in its motion. The first law states that an object at rest will stay at rest, unless acted on by an outside force. It also states that an object in motion will stay in motion at a constant rate unless acted on by an external force. An example of this could be while someone breaks at the start of a pool game. The racked balls want to stay at rest, but when the cue ball strikes them they have to move! Also, the cue ball will stay in motion until it meets the racked balls.
Newton's First Law of Motion

Newton's 2nd Law of Motion

The 2nd law states that the acceleration of an object is in the same direction as the net force on the object. An equation to solve this would be a=Fnet/m. Most people use the equation F=ma. A smaller mass object takes less of a force than a larger mass object as displayed in the video below. A prime example of the 2nd law could take place at a football game. The offensive lineman and the defensive end are both very large people. They will apply a force using their mass, and the player with the acceleration and mass will apply the greater force on the other, resulting in one pushing the other.
Newton's Second Law of Motion

Newton's 3rd Law of Motion

For every action force, there is an equal and opposite reaction. People use this law in so many ways in their lifetime without even knowing it. For example, looking at the image below, the rocket has hot gases coming out of the rocket and pushing downward. The rocket then is propelled up into the air. Also, look at the video below.
Physics of Football - Newton's Third Law of Motion