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A tag for questions about the mechanical interactions of rotating objects, including torque and angular momentum.

1 vote
1 answer
311 views

Lagrange equation for the pendulum

This is Wilberforce Pendulum that has spring & weight: https://faraday.physics.utoronto.ca/IYearLab/WilberforceRefBerg2of8.pdf Wilberforce pendulum is a system of a spring hanging vertically, and a we …
Sanghwa Lee's user avatar
0 votes
1 answer
1k views

How can I calculate the moment of inertia of a helical spring with mass?

I would like to calculate the moment of inertia of a helical spring. When torque acts on the lower part of the spring hanging on the ceiling, Every part of the spring will have different angular accel …
Sanghwa Lee's user avatar