How Does a Spring Affect Cart Velocity After Collision?

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Homework Help Overview

The discussion revolves around a physics problem involving two carts, one of which has a spring attached. The original poster seeks to determine the final velocity of the first cart after a collision, specifically considering the effects of the spring.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the conservation of momentum and kinetic energy, questioning how the spring's energy affects the system. There is confusion regarding the initial conditions and the sequence of events, particularly the role of the spring when the carts are initially at rest.

Discussion Status

The discussion is active, with participants raising questions about conservation principles and the implications of the spring's energy. Some guidance has been offered regarding the distinction between momentum and kinetic energy in this context, but no consensus has been reached.

Contextual Notes

Participants are navigating the complexities of energy conservation in a system involving a spring, with initial conditions that may not be fully clear. The discussion reflects uncertainty about how to incorporate the spring's potential energy into the analysis.

louise82
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If two carts collide and cart 1 has a spring on it, how can I figure out the final velocity of the first cart?
 
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What's conserved?
 
kinetic energy and momentum
 
what's throwing me off is the spring...

the carts are initially at rest together, then the spring on cart 1 is released.
 
louise82 said:
the carts are initially at rest together, then the spring on cart 1 is released.
I thought you said they collided?

louise82 said:
kinetic energy and momentum
Momentum, yes. Kinetic energy, no. (They start at rest, then begin to move.) Hint: Consider the energy stored in the compressed spring.
 
Last edited:

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