Find angular velocity of the system

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Homework Help Overview

The discussion revolves around calculating the angular velocity of a system involving two masses and their interactions during a collision. The subject area includes concepts of angular momentum, kinetic energy, and the moment of inertia, particularly in the context of rotational dynamics.

Discussion Character

  • Mixed

Approaches and Questions Raised

  • Participants discuss the calculation of the center of mass and the initial velocities of the system. There are attempts to relate angular momentum and kinetic energy to find the final angular velocity. Questions arise regarding the appropriate velocity to use and how to determine the angle involved in the calculations.

Discussion Status

Some participants have provided guidance on using the conservation of kinetic energy and the parallel axis theorem to find the moment of inertia. There is ongoing exploration of how to set up equations correctly and whether the assumptions made about the system are valid. Multiple interpretations of the problem are being considered, particularly regarding the treatment of the disk's mass distribution.

Contextual Notes

Participants note the complexity of the system due to the disk not being treated as a point mass, leading to varied distances from the center of mass. There are also discussions about the implications of inelastic collisions and the need to account for both translational and rotational motion.

  • #31
thepatient said:
Seems about ok. I got 12.1 rad/s but I used different amount of significant figures. What does the answer on the back of the book say?

It's on a paper exam, so not sure about the answer yet :(
 

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