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Newton's Laws of Motion
Transcript of Newton's Laws of Motion
March 5, 2013 Newton's Laws of Motion Newton's first law of motion states 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.
Example 1 This is a picture of an object(s) at rest. If something unbalanced were to hit it, it would topple over. But, if it were to remain untouched it would stay at rest. This proves that Newton's first law of motion is true. An object at rest will stay at rest unless acted on by an unbalanced force. The Second Law of Motion states that... The guy in the picture is kicking a soccer ball. The soccer ball was the object at rest. The guy that kicked the soccer ball was the unbalanced force. The soccer ball is now in motion. This is an example of Newton's first law of motion. Example 2 the force of an object is equal to its mass times its acceleration. Example 1 In this picture, two boys are pulling rocks attached to strings. Boy 1 is pulling a rock with greater mass than boy 1, so his acceleration will be lower because he has to apply a greater force. Boy 1 is pulling a rock with very little mass so he has to apply less force so his acceleration is greater than Boy 1's.
The difference in mass, acceleration, and force demonstrates Newton's second law of motion. Boy 1 Boy 2 In this picture a boy is pushing on a door. He cannot open the door because he is not applying enough force. His mass and acceleration aren't great enough. If he had more mass and acceleration he'd be able to open the door. This demonstrates Newton's second law of Motion. Example 2 Newton's First Law of Motion states that... for every action there is an equal and opposite reaction. In this picture a person is skateboarding. The skateboarder pushes on the skateboard and it moves in the opposite direction. The push is the action and the skateboard rolling is the equal and opposite reaction. This proves Newton's third law of motion. In this picture a person is shooting a gun. He shoots the gun and the gun kicks back causing him to be shoved backwards. The gun is the action and him being shoved backwards is the equal and opposite reaction. This proves Newton's third law of motion.