Completely Inelastic Collision Question

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SUMMARY

The discussion centers on solving a completely inelastic collision problem, specifically focusing on calculating the change in kinetic energy (ΔEk) after the collision. The user has successfully determined the momentum and final velocity (Vf = 5.0/3.0 m/s) but seeks clarification on the "max value" referenced in the ΔEk equation. The change in kinetic energy is defined as the difference between the final kinetic energy and the initial kinetic energy, which can be calculated using the respective formulas for kinetic energy.

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  • Understanding of completely inelastic collisions
  • Familiarity with momentum conservation principles
  • Knowledge of kinetic energy calculations
  • Basic algebra for solving equations
NEXT STEPS
  • Calculate initial kinetic energy using the formula KE_initial = (1/2) * Ma * Via^2
  • Calculate final kinetic energy using the formula KE_final = (1/2) * (Ma + Mb) * Vf^2
  • Research the concept of energy loss in completely inelastic collisions
  • Explore additional examples of inelastic collisions for practical understanding
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Students studying physics, particularly those focusing on mechanics and collision theory, as well as educators looking for examples of inelastic collision problems.

Inertialforce
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Homework Statement


In the question that we were given it states that the resulting collision is a completely inelastic collision. Then it asks us to solve for the momentum and kinetic energy.

For the momentum part I have already solved it and have values for final and initial velocities that I know are right. What I don't understand however is how we are supposed to find the change in kinetic energy here because the only formula I could find for "completely inelastic collisions" was ΔEk = max value.

My question is, what would the "max value" equal to (or represent) in the equation ΔEk = max value?

Ma = 1.0
Ma = (1/2)Mb
Via = 5.0m/s
Vib = 0m/s
Vf = 5.0/3.0 m/s (found through momentum calculations)

Homework Equations


Δp = 0
ΔEk = max value

The Attempt at a Solution

 
Last edited:
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The change in KE is simply the final KE (calculate it) minus the initial KE (calculate it).
 

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