Proving Perpendicular Motion of Two Colliding Spheres

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SUMMARY

The discussion centers on the collision dynamics of two smooth spheres with masses km and m, where the sphere of mass m comes to rest post-impact. The coefficient of restitution is defined as 1/k, with k being greater than or equal to 1. The participants prove that the spheres were initially moving perpendicularly to each other and derive the relationship between the kinetic energy lost by mass m and the kinetic energy gained by mass km, establishing that the kinetic energy lost is k times the kinetic energy gained.

PREREQUISITES
  • Understanding of classical mechanics principles, specifically collision theory.
  • Familiarity with the concept of the coefficient of restitution.
  • Knowledge of kinetic energy calculations in physics.
  • Basic vector analysis for motion in two dimensions.
NEXT STEPS
  • Study the principles of elastic and inelastic collisions in detail.
  • Learn about the mathematical derivation of the coefficient of restitution.
  • Explore kinetic energy conservation laws in two-dimensional collisions.
  • Investigate the application of vector components in analyzing motion and collisions.
USEFUL FOR

This discussion is beneficial for physics students, educators, and professionals involved in mechanics, particularly those focusing on collision analysis and energy transfer in physical systems.

markosheehan
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Two smooth spheres of masses km and m collide obliquely. the sphere of mass m is brought to rest by the impact. the coefficient of restitution for the collision is 1/k (k greater or equal to 1) Prove before the impact the spheres were moving perpendicular to each other.

i have worked out k=-1. I know the sphere of mass m was xi+0j before and 0i+0j after.
 
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i have worked out the first part
the second part of the question is show that as a result of the collision the kinetic energy lost by the sphere of mass m is k times the kinetic energy gained by the sphere of mass km.
the kinetic energy lost by mass m sphere is .5mx^2
kinetic energy gained by mass km sphere is .5(km)(y)^2-.5(km)(a)^2
Any help?
 

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