What Happens When Two Equal Mass Carts Collide Head-On at the Same Velocity?

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Homework Help Overview

The discussion revolves around a physics problem involving a head-on collision between two dynamics carts of equal mass, one initially at rest and the other in motion. The original poster is seeking clarification on the outcomes of such a collision, particularly when both carts are moving at the same speed.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants are exploring the implications of mass and velocity in collisions, questioning the outcomes based on symmetry and the initial conditions of the carts. There is a focus on the concepts of momentum and energy conservation in the context of elastic collisions.

Discussion Status

The discussion is active with participants providing hints and engaging in a back-and-forth about the assumptions underlying the problem. Some guidance has been offered regarding the need for additional information and the application of conservation laws, but no consensus has been reached on the specific outcomes of the collision.

Contextual Notes

Participants note the importance of clarifying whether the collision is perfectly elastic, which affects the analysis of the final speeds. There is also an indication that the original poster may need to consider the timing of the carts' velocities during the collision.

game
Hey here's a quick easy quetion, just to make sure doing a lab and please answer right away if possible. A dynamics cart moving with speed v is made to collide "head-on" with a second dynamics cart of equal mass, which is initially at rest. Well I predicted that both have equal masses they will experience the same roughly veolicity, is that correct?

But what if they collide on with same speed?
 
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Both carts have the same speed and same mass. The situation is completely symmetric. What do YOU think will happen?
 
Originally posted by HallsofIvy
Both carts have the same speed and same mass.

No, they don't. At least, not at the same time...(grin)
Initially, one car is at rest, the other is not.

Hint: ever played snooker?
 
I believe HallsofIvy was discussing the second question.
 
Yep, that was what I intended to answer but I didn't make that clear.

game, if you are still working on this- you really need more information. If you are assuming perfectly elastic collisions, then use conservation of momentum and conservation of energy to get two equations for the two final speeds.
 

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