Wedge and block initial momentum

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Homework Help Overview

The problem involves a block sliding down a smooth triangular wedge, which is placed on a smooth floor. The objective is to find the velocity of the wedge when the block reaches the bottom. The discussion centers around the application of conservation of linear momentum and energy in this context.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss the initial conditions of the system, questioning why the initial momentum is considered zero. There is exploration of the forces acting on the block and wedge, including normal forces and gravitational components. Some participants seek clarification on the meaning of "initially at rest" and how it applies to the problem setup.

Discussion Status

The discussion is ongoing, with participants actively questioning assumptions and clarifying the initial conditions necessary for applying conservation laws. There is recognition that the problem may not have been clearly stated, leading to varied interpretations of the initial state of the system.

Contextual Notes

Participants note that the problem involves a block at a height h and that the system is considered to be at rest before the block is released. There is some confusion regarding the forces acting on the block and wedge during their interaction.

  • #91
ehild said:
The problem was poorly worded.
I have given my best.
 
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  • #92
gracy said:
h=1/2 MV^2(M+m)÷m^2 g.
g is in multiplication with m^2.
Then write it as h=1/2 MV^2(M+m)/(m^2 g)
 
  • #93
gracy said:
I have given my best.

Well, your teacher had to be more clear.
 

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