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The mr freezz going backwards is an example of negative acceleration

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When the superman went down is an example of free fall

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The mr. freezz being stopped at the top is an example of of inertia.

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The batman going up the hill is an example of positive acceleration

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Right before the roller coaster dropped the amount of energy in the cart was being stored.  This makes it high potential energy

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As the roller coaster released the stored energy it became kinetic due to the fact the roller coaster was moving at its fastest speed at the bottom. this happens because gravity pulls things down and obviously the roller coaster is going to be pulled because it is on a hill.

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The straw in the water bottle is an example of refraction because the straw looks like its bend.

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The centripetal acceleration occurred here because the tower was the center of the objects acceleration.  Because the rope was tied to the tower the carts still flung around in a circular motion.

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the trees in the picture were reflected by the water which acted as a medium.  the light bouncing on the trees bounced onto the water and was reflected off.

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the boat moving like a pendulum is an example of harmonic motion.