A massless rod

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A 4.6 m massless rod is loosely pinned to a frictionless pivot at 0. A 8.7 kg ball is attached to the other end of the rod. The ball is held at A, where the rod makes a 30° angle above the horizontal, and is released. The ball-rod assembly then swings freely in a vertical circle between A and B. In the figure, the tension in the rod when the ball passes through the lowest point at D is closest to:

Answers (3)

  • Anonymous

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