How to Calculate Angular Impulse for Inelastic Collision?

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SUMMARY

The discussion focuses on calculating angular impulse during an inelastic collision where two objects stick together. The key equation derived is Impulse = Lf - Li, which translates to Iwf - Iwi, incorporating both objects' moments of inertia and angular velocities. The user correctly identifies that the impulse should be calculated for each object separately before summing them up to find the total impulse. The calculations involve the moments of inertia for both masses, M and m, and their respective angular velocities.

PREREQUISITES
  • Understanding of angular momentum and impulse concepts.
  • Familiarity with the moment of inertia calculations for rigid bodies.
  • Knowledge of inelastic collisions and their characteristics.
  • Basic proficiency in applying equations of motion in rotational dynamics.
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  • Study the principles of angular momentum conservation in inelastic collisions.
  • Learn how to derive and apply the moment of inertia for various shapes and masses.
  • Explore the relationship between linear and angular impulse in collision scenarios.
  • Investigate real-world applications of angular impulse in mechanical systems.
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Physics students, mechanical engineers, and anyone studying dynamics and collisions in rotational systems will benefit from this discussion.

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Homework Statement



(Refer to attachment)

Homework Equations



None.

The Attempt at a Solution



5.1 Inelastic collision because they stick together.

5.2 Impulse = Lf - Li
= Iwf - Iwi
= (1/2MR^2 + mR^2)w1 - (1/2MR^2)w0 + mRv0

I tried to use this equation which is related to the linear one, but not sure if it is right for angular impulse. Also I don't understand whether you can have an impulse for 2 objects at the same time (as for example the linear equation F(t) = m(vf - vi), only has the mass of 1 of the objects, not both of them).
 

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I think the impulse should be calculated for each object separately, and then add them up.Impulse for M = Iwf - Iwi = (1/2MR^2)w1 - (1/2MR^2)w0Impulse for m = Iwf - Iwi = mR^2w1 - mRv0Total Impulse = (1/2MR^2)w1 - (1/2MR^2)w0 + mR^2w1 - mRv0 = (1/2MR^2 + mR^2)w1 - (1/2MR^2)w0 + mRv0
 

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