A demonstration of the conservation of angular momentum using a Hoberman sphere. Angular momentum depends on the rotational velocity of an object, and on its rotational inertia. When an object changes its shape, its angular velocity will also change.pic.twitter.com/UUQqALp3HW
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yes but if you look at the equation i posted the integral is an integral over time and the pull itself as a function of time (by observation) is not equal .. besides gravity is acting in both cases
I think you may be missing what i'm saying .. Angular Momentum is always conserved when all torques are accounted for. That is, for a given definition of the "system" My quibble was that the demonstration was not a closed system, but people might think that is was
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In the torque sense I don't see how it is not closed... What mechanism am I missing for applying the torque?
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If we look the problem in term of energy, then the work made against gravity equals the work to shrink the sphere and such work becames kinetic energy on masses...
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