Newton's Third Law According to Newton, whenever objects A and B interact with each other, they exert forces upon each other. When you sit in your chair, your body exerts a downward force on the chair and the chair exerts an upward force on your body. There are two forces resulting from this interaction - a force on the chair and a force on your body. These two forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: Definition: When a first body exerts a force on a second body, the second body simultaneously exerts a force F1=F2 on the first body. This means that force 1 and force 2 are equal in magnitude and opposite in direction. Newton's Third Law of Motion By: Morgan McDonald #12

Partners: Mattie Bryant and Prathithi Paraseuram

Due Date: November 2, 2012 Another Basic way to say this definition is that for every action there is an equal but opposite in direction reaction. All moving objects have what Newton called a "quantity of motion." Today we call this momentum. Momentum is a characteristic of a moving object that is related to the mass and the velocity of the object. The momentum of a moving object can be determined by multiplying the object's mass and velocity.

Momentum= Mass x Velocity

Acceleration is a key in Newtons Laws of motion. The definition of acceleration is the rate at which velocity changes. Examples of Newton's Third Motion

When a kayaker's paddle pulls on the water. The reaction force of the water pushes back on the paddle, cusing the kayak to move.

When a dog leps, it pushes down on the ground. The reaction force of the ground pushes the dog in the air.

Action-Reaction Pairs

Action-reaction pairs explain how a gymnast can flip over a vaulting horse, how a kayaker can move through water, and how a dog can leap off the ground and many more. I hope this Prezi helped you learn more about Newton's Third Law of Motion. Maybe you can try to make this happen with a partner. Maybe you can create reactions with acceleration and force as well! I hope you learned a lot through this video.

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# Newton's Third Law of Motion

By: Morgan McDonald