To find the angular momentum of a disc

AI Thread Summary
The discussion revolves around calculating the angular momentum of a disc when a block falls and the string becomes taut. Participants clarify that conservation of energy cannot be applied due to energy loss during the inelastic impact when the string becomes taut. They also address the torque produced by the string, noting that while the block falls, there is no tension and thus no torque acting on the disc. The conversation emphasizes the importance of analyzing the system just before the string becomes taut to determine the angular momentum. Ultimately, understanding the dynamics of the system at this critical moment is essential for accurate calculations.
  • #51
haruspex said:
The whole string length is L, so the block will fall a distance L before the string becomes taut.
Got it! :doh:
 

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