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4. Consider a scenario where a ball with a mass of 10 kg is hung on a frictionless inclined plane
at a = 30°. The inclined plane itself moves along the direction indicated
in the right figure with an acceleration a = g/3. Find: (a) the tension in
the rope. (b) the normal force of the ball on the inclined plane. (c) the
acceleration of the inclined plane at which the normal force of the ball
on the inclined plane becomes zero.

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