Quick easy question block sliding down wedge

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Homework Help Overview

The discussion revolves around a physics problem involving a block sliding down a wedge, with considerations for both a stationary and a moving wedge. The problem is set in the context of classical mechanics, specifically analyzing motion and forces.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants explore the independence of x and y components of motion, questioning whether the time taken for the block to slide down differs based on the wedge's movement. Some participants suggest considering the mass of the wedge and the block, while others inquire about the application of physics principles, such as Lagrangian mechanics.

Discussion Status

The discussion is ongoing, with participants seeking clarity on the problem setup and the application of relevant physics concepts. There is a recognition of the need for a clearer understanding of the forces involved, particularly regarding the wedge's motion due to the block's weight.

Contextual Notes

Participants note that the problem involves a spring mechanism that causes the wedge to move when the block is released, which adds complexity to the analysis. There is also an acknowledgment of the need for more precise definitions and assumptions regarding the system's behavior.

troytroy
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Homework Statement


If a block is let go from the top of a wedge elevated at a certain angle and slides down will it reach the bottom at the same time as if the wedge was moving and then we let the block slide? so neglect friction and air resistance and basically just let the block slide down the wedge as it is at rest and while it is moving.


Homework Equations





The Attempt at a Solution


since the x and y components are independent of each other I assume that the block will take the same about of time to reach the bottom but just wanted someone elses input, thanks!
 
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troytroy said:

Homework Statement


If a block is let go from the top of a wedge elevated at a certain angle and slides down will it reach the bottom at the same time as if the wedge was moving and then we let the block slide? so neglect friction and air resistance and basically just let the block slide down the wedge as it is at rest and while it is moving.


Homework Equations





The Attempt at a Solution


since the x and y components are independent of each other I assume that the block will take the same about of time to reach the bottom but just wanted someone elses input, thanks!

Since this is a physics question, shouldn't you use some physics principles to answer it? If I get what you are asking, suppose the wedge is almost massless and the block is very massive. Then what?
 
All the question is asking about is about the time it takes a block slide down a wedge when the wedge is not moving at all and then how long it takes if the wedge is moving.
 
troytroy said:
All the question is asking about is about the time it takes a block slide down a wedge when the wedge is not moving at all and then how long it takes if the wedge is moving.

No, it's not. If the wedge gets to move anyway it wants to then there is no particular answer. Anything is possible. I truly believe they want you to assume the the force exerted on the wedge by the block is what's making the wedge move.
 
I apologize I should have been much more clear about the problem. The problem started off as setting up a lagragian and the reason the wedge is moving is because of the energy from a spring that pushes it as soon as the block is released
 
troytroy said:
I apologize I should have been much more clear about the problem. The problem started off as setting up a lagragian and the reason the wedge is moving is because of the energy from a spring that pushes it as soon as the block is released

That's ok. But I still don't see that you've used any physics in your answer, much less a lagrangian. Could you do that?
 

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