I have two 2 rigid bodies with masses m1 and m2 and Moments of Inertia I1 and I2, they are connected by a free rotational joint at some point, their coms lie at c1 and c2. There's gravity.(adsbygoogle = window.adsbygoogle || []).push({});

In the beginning both have some angular velocity [itex]\omega_i[/itex]

Questions:

- Total angular momentum of the system

[STRIKE]- COM trajectory[/STRIKE]

Attempt:

- Calculating L of the two bodies is no Problem with [itex]L=I\cdot\omega[/itex], Also if they're unconnected L is simply [itex]L_1+L_2[/itex]. However my attempts at finding the total angular Momentum don't seem to work out.

[STRIKE]- I thought that the COM trajectory should simply be gravity dependent, i.e. [itex]\frac{1}{2}gt^2[/itex], but somehow it wobbles in my physics simulator. (I'm using PhysX 2.8.3)[/STRIKE] (The COM trajectory is what it should be :) )

- Also I thought to calculate the total Angular Momentum I would have to shift the two Momenta to the COM via the parallel axis thm, and then build the sum.

So I'm stuck - any help would be very much appreciated.

Best,

xtin

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# Homework Help: Total Angular Momentum of 2 connected falling bodies.

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