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# Newton's Third Law of Motion

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## Tiffany Do

on 20 September 2013

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#### Transcript of Newton's Third Law of Motion

Interesting Facts
Newton's Third Law of Motion
Examples
Demonstration 1: Blow up a balloon and then release it. Watch how the air rushes out of the bottom of the balloon and the reaction as the balloon soars upward.

Citations
http://heasarc.gsfc.nasa.gov/Images/xte/xte_launch1.gif
http://selair.selkirk.bc.ca/training/aerodynamics/graphics/reaction-lift.gif
http://www.trollscientist.com/image/849-third-law-troll-physics.jpg
What is Newton's 3rd
Law of Motion?

Newton's Third Law of Motion:
For every action, there is an equal and
opposite reaction. (Dictionary Definition)

For every force that is acted upon an object, there is another force that will balance the unbalanced force in order to stop the object from being in motion.
Demonstration 2: Throw ball at a person skating on roller blades. Observe how the force of the ball hitting the person propels them on the roller blades backwards.
Video
Our Definition
One of Newton's famous quotes include: "Plato is my friend-Aristotle is my friend- but my greatest friend is truth."
In 1642, the year Galileo passed away, Newton was born prematurely and was not even expected to live. In fact, he was so small, he could fit inside a quart mug.
When Newton was 17, his mom had insisted for him to go back to the family farm and quit school. However, luckily for Newton, he wasn't that great at farming, so his uncle successfully convinced Newton's mom to let Newton go to attend Trinity College in Cambridge instead.
People say that Newton was inspired when an apple fell on his head, but in reality, Newton claimed that he was just looking out of his window when he saw an apple fall from a tree.
Tiffany Do, Sade Adeniran, Selah Stapleton & Rachel Hauschel
Connection
When a baseball bat strikes a ball, there's no doubt the bat applies a force to the ball because it accelerates rapidly after it is struck. But, Newton's Third Law informs us that the ball must also be applying a force to the bat. The mass of the ball, however, is small compared to the mass of the bat, which includes the batter holding the end of it. Still, if you've ever seen a wooden baseball bat break into pieces as it strikes a ball, then you've seen firsthand evidence of the ball's force.
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