A 30kg mass is tied to a uniform rod whose mass and length are 80-kg and 8-m, as shown below. The rod is attached to the floor via a hinge and makes an angle of 70° relative to the ground; a massless string is also attached to the rod at the ¼ point of the rod and makes an angle of 20° relative to the horizontal. What tension must be provided by the rope so that the system remains in stationary? If at some point the string breaks, what will be the angular acceleration of the system the instant that the string breaks?

Precision Machining Technology (MindTap Course List)
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ISBN:9781285444543
Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes
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A 30kg mass is tied to a uniform rod whose mass and length are 80-kg and 8-m, as shown below. The rod is attached to the floor via a hinge and makes an angle of 70° relative to the ground; a massless string is also attached to the rod at the ¼ point of the rod and makes an angle of 20° relative to the horizontal.

  1. What tension must be provided by the rope so that the system remains in stationary?
  2. If at some point the string breaks, what will be the angular acceleration of the system the instant that the string breaks?
30-kg
80-kg
70 deg
20 deg
Transcribed Image Text:30-kg 80-kg 70 deg 20 deg
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