Collisions Question: Moment whilst force acts through CoG

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SUMMARY

The discussion centers on the analysis of a collision force acting through the center of gravity (CoG) and its implications on angular momentum. The participant resolved the force into a new frame of reference, identifying moments and angular momentum equations. Despite the collision force acting horizontally through the CoG, the participant expresses confusion over the presence of a moment about the Z-axis, questioning the physical validity of this occurrence. The resolution of this issue is critical for a comprehensive understanding of collision dynamics.

PREREQUISITES
  • Understanding of collision dynamics and forces
  • Familiarity with angular momentum equations
  • Knowledge of inertial frames of reference
  • Basic principles of moments and torque
NEXT STEPS
  • Study the principles of angular momentum in collision scenarios
  • Learn about the effects of force application points on moments
  • Explore the concept of inertial frames and their impact on force resolution
  • Investigate the physical implications of forces acting through the center of gravity
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Physics students, mechanical engineers, and anyone studying collision mechanics and angular momentum analysis.

Kushwoho44
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Homework Statement


EDIT: DO NOT READ. I SOLVED IT.[/B]
The collision in this problem acts at point C and acts a purely horizontal force in the inertial frame of reference.
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Homework Equations


upload_2015-11-6_21-31-13.png


The Attempt at a Solution



I understand the maths that is at work here, when we resolve the force into the new frame of reference, x1 and y1, we can find the moments and develop the angular momentum equations.

However, what is bothering me is that there is a moment about the Z (or Z1, it's the same) axis despite the collision force acting through line of the centre of gravity?

This is deeply annoying to me, because I'd think this physically impossible. So, I'm not sure where the hole in my physical understanding of the problem is.
 
Last edited:
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