Newton's Laws of Motion

By: Bri K.

Newton's First Law

Newton's first law of motion says that an object in motion will stay in motion and an object at rest will stay at rest unless acted on by an unbalanced force.

This Newton's Cradle shows Newton's first law of motion by demonstrating that objects (the metal marbles) will stay at rest until another force (the metallic marble that is moving) acts on the objects at rest. It also shows that an object that is moving remains moving until another object pushes or pulls it because only one marble is moving at a time until it hits another marble and passes on its motion to that marble. Also under the first law it states that all objects resist having their motion changed (inertia) and the more mass an object has, the greater its inertia.

Newton's Second Law

The second law of motion states that the force of an object is equal to its mass times its acceleration.

This diagram represents Newton's second law because it shows how the acceleration of an object depends on its mass even though the objects are being applied the same amount of net force, therefore the heavier the object (the car) the smaller the amount the object will accelerate whereas, the lighter the object (the can) the larger the amount the object will accelerate because Force=Mass x Acceleration.

Newton's Third Law

Newton's third law of motion states that for every action there is an equal and opposite reaction.

This diagram represents Newton's third law because it shows that when one object exerts a force on a second object (the engine pushed forward), the second object exerts an equal force in the opposite direction on the first object (the exhaust flow pushed backward). The engine pushing forward is the action force and the exhaust flow pushing backward is the reaction force.

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