One end of a cord is fixed and a small 0.500-kg object is attached to the other end, where it swings in a section of a vertical circle of radius 2.00 m, as shown in Figure P7.19. When angle = 20.0, the speed of the object is 8.00 m/s. At this instant, find the tension in the string, the tangential and radial components of acceleration and  the total acceleration  Is your answer changed if the object is swinging down toward its lowest point instead of swinging up? Explain.

Principles of Physics: A Calculus-Based Text
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Author:Raymond A. Serway, John W. Jewett
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Chapter10: Rotational Motion
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Problem 11P: A disk 8.00 cm in radius rotates at a constant rate of 1200 rev/min about its central axis....
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One end of a cord is fixed and a small 0.500-kg object is attached to the other end, where it swings in a section of a vertical circle of radius 2.00 m, as shown in Figure P7.19. When angle = 20.0, the speed of the object is 8.00 m/s. At this instant, find

  1. the tension in the string,

  2. the tangential and radial components of acceleration and 
  3. the total acceleration 
  4. Is your answer changed if the object is swinging down toward its lowest point instead of swinging up? Explain. 
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