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Q. During a circus performance, a 72 kg human cannonball is shot out of an 18 meter long cannon. If the human cannonball spends 0.95 seconds in the cannon, determine the average net force exerted on him in the barrel of the cannon.

Q. A motorcyclist is able to ride on the vertical wall of a bowl- shaped track as shown. his weight is counteracted by the friction of the wall on the tires. what force increase or decrease if he rides faster?

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