Does Weight Difference Affect Velocity in a Frictionless Pulley System?

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Discussion Overview

The discussion revolves around the effects of weight differences on the velocity of a system involving a frictionless pulley. Participants explore whether the final velocity is influenced by the difference in weights or if it remains constant regardless of the counterweight's presence. The conversation includes theoretical considerations and mathematical reasoning.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Mathematical reasoning

Main Points Raised

  • One participant states that if two weights are equal, they will remain at rest, but if one weight is slightly heavier, it will cause the other to rise.
  • Another participant claims that the final velocity is infinite, suggesting that the acceleration of the system is the key factor.
  • There are suggestions to use free body diagrams to derive equations for the system, indicating a mathematical approach to the problem.
  • Some participants propose using energy conservation principles to analyze whether the final velocity is the same regardless of the weight difference.

Areas of Agreement / Disagreement

Participants express differing views on the final velocity, with some asserting it is infinite while others suggest using different methods to analyze the situation. The discussion remains unresolved with multiple competing perspectives on the influence of weight differences.

Contextual Notes

There are references to free body diagrams and energy conservation, but the discussion does not resolve the mathematical steps or assumptions involved in these approaches.

bobie
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If two weights (Edit: hanging 10m above ground) on a frictionless pulley are equal (10kg) they will rest. If one is even slightly heavier (10.1kg) it will start to fall lifting up the other.

Is final velocity dependent on the difference of weight, or it will the same as if there is no counterweight?
 
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What do you think?
 
The final velocity is infinite, the acceleration rate of the system is the dependent, the root equation :
f = m * a
 
bobie said:
Is final velocity dependent on the difference of weight, or it will the same as if there is no counterweight?
Are you familiar with free body diagrams? If so, then draw one for each weight, use that to help you write two equations in two unknowns. Then solve.
 
dean barry said:
The final velocity is infinite
I assume that "final" is when the counterweight hits the pulley.

DaleSpam said:
Are you familiar with free body diagrams? If so, then draw one for each weight, use that to help you write two equations in two unknowns. Then solve.
Or use energy conservation to see if the velocity is the same.
 
A.T. said:
Or use energy conservation to see if the velocity is the same.
Excellent suggestion, that is even easier than my approach.
 
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