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A motorcycle with a mass of 3 kg is inside of a vertical loop with a...

A motorcycle with a mass of 3 kg is inside of a vertical loop with a radius 8 meters. At the top, the only forces acting motorcycle in the normal force and weight force. At the top, the amount of the normal force is a factor of 2 times less than the motorcycle's weight. As it moves to the side of the circle, some other forces act on it. But when it reaches the side, only the normal force and the weight are acting on it and the amount of the normal force on the side is 4 times the motorcycle's weight. How much net work, in Joules, is done by all forces acting on the motorcycle as it moves from top to the side of the circle?

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