Frequently Made Errors in Mechanics - Momentum and Impacts - Comments

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The discussion centers on common mistakes in understanding mechanics, specifically regarding momentum and impacts. The post by haruspex highlights key errors that students often make in these areas. Participants express appreciation for the insights provided, indicating the post's value in clarifying complex concepts. The conversation encourages further exploration of the topic and invites readers to engage with the original content. Overall, the thread emphasizes the importance of addressing misconceptions in physics education.
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Frequently Made Errors in Mechanics - Momentum and Impacts

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Thread 'Is energy really conserved?'

I built a device designed to brake angular velocity which seems to work based on below, i used a flexible shaft that could bow up and down so i could visually see what was happening for the prototypes. If you spin two wheels in opposite directions each with a magnitude of angular momentum L on a rigid shaft (equal magnitude opposite directions), then rotate the shaft at 90 degrees to the momentum vectors at constant angular velocity omega, then the resulting torques oppose each other...
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