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Similar to objects in free fall that accelerate at negative 9.8 meters per second, this roller coaster is accelerating down the hill in the negative direction if down is negative and up is positive

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The greatest potential energy occurs at the point of which the object reaches its maximum height and minimum kinetic energy. The first drop on the Titan has the greatest amount of potential energy because it is the highest drop during the entire roller coaster.

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Work is a change in energy. In this video, the roller coaster is slowing down for a small period of time before it continues, otherwise known as braking. This can be categorized as negative work because the friction from the wheels on the cart are allowing the roller coaster to brake properly before the ride becomes too fast.

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The greatest kinetic energy on a roller coaster is the point where there is the least amount of gravitational energy. For the ride, Titan, the first drop has the greatest amount of potential energy, so the moment where the roller coaster is closest to the ground after that is the greatest kinetic energy.

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Simple harmonic motion is the motion of which the restoring force is proportional to the amount of displacement from the equilibrium position. In this scenario, the boat is moving from either side of the equilibrium at the same rate on both sides.

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Boats and boating--Equipment and supplies

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Impulse is a force applied to an object for a certain amount of time. In this video the lanyard in in free fall when an applied force from Hanna's hand acts on the lanyard. The amount of applied force for the amount of time it was applied is impulse.

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Free fall happens when the only force acting on an object is gravity. In this video the only force acting on the water bottle, from Sydney's hand to the ground, is gravity. During this interval the water bottle is in free fall.

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Centripetal acceleration is the change in tangential velocity when an object is moving in a circle. Centripetal acceleration is always pointed towards the center of the circle. The teacups in this video show centripetal acceleration because the force the force acting on the people moving in a circle is pointed towards the center of the circle.

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In this video positive is towards the left. Positive acceleration is a change in speed in the positive direction. In the video, you can see that the roller coaster is accelerating positively because it is increasing its speed in the positive direction.

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Newtons first law says that an object stays in motion or at rest until acted upon by an unbalanced force. In the video the object (Nicole) stays in motion until acted upon by the unbalanced force from the fence.