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7 thoughts on “12.3 Virtual Displacement
  1. Loved this series of videos. It explains the real math behind pulley's that really allows you to visualise the forces at play and how the system works.

  2. I have one doubt.If change in y1=-2*change in y2 in a given time interval ,then how can we conclude that the velocities and acceleration of 1 is twice that of 2.I can sense that however if you can derive it mathematically it would be great.

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