How Fast Must a Block Slide to Circle a Loop After Inelastic Collision?

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SUMMARY

The discussion focuses on determining the minimum speed \( v_m \) required for a block of mass \( m \) to successfully complete a loop after colliding inelastically with a stationary block of mass \( M \). The relevant equations include conservation of energy, represented as \( U_{\text{initial}} + K_{\text{initial}} = U_{\text{final}} + K_{\text{final}} \), where potential energy \( U = mgh \) and kinetic energy \( K = \frac{1}{2}mv^2 \). The problem emphasizes analyzing the forces acting on the blocks at the top of the loop to ensure they remain on the track.

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  • Understanding of conservation of energy principles in physics
  • Familiarity with inelastic collisions and their implications
  • Knowledge of circular motion dynamics and forces acting on objects in a loop
  • Basic algebra for solving equations involving kinetic and potential energy
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  • Study the principles of conservation of momentum in inelastic collisions
  • Learn about the conditions for an object to maintain circular motion at the top of a loop
  • Explore examples of energy conservation problems involving loops and collisions
  • Review the derivation of velocity equations for objects in circular motion
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Homework Statement


A block of mass m slides along a frictionless track with speed vm. It collides with a stationarty block of mass M. Find an expression for the minimum value of vm that will allow the second block to circle the loop the loop without falling off if the collision is perfect inelastic.


Homework Equations


Uinitial+Kinitial=Ufinal+Kfinal
U=mgh
K=1/2mv^2

The Attempt at a Solution


Since this is a frictionless track, there is no initial kinetic energy, but that is all i really can figure out i am completely lost someone please help!
 

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It is easier to consider this problem backwards: At the top of the loop, the masses are supposed to stay in their track. Which forces act on them? How can they stay in the track, and which velocity do they need?

The masses come from the bottom of the loop. What was their velocity there?

And afterwards, consider the collision.
 

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