Impending motion vs start to slide

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Homework Help Overview

The discussion revolves around the differences between two questions related to the motion of a block, specifically focusing on impending motion versus the start of sliding. Participants express confusion regarding the nature of the problem and its context, questioning whether the scenarios presented are the same or distinct.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Some participants attempt to clarify the distinction between sliding and tipping motions, suggesting that part (a) may refer to tipping. Others question the validity of the problem setup, noting the unusual parameters of the block's height and weight.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem. There is a suggestion that the answers for the two parts may be switched, and questions about the conditions necessary for tipping are raised, indicating a productive exploration of the topic.

Contextual Notes

Participants note the peculiar characteristics of the block in the problem, which may influence their understanding of the motion types being discussed. There is also uncertainty about the source of the problem, with some questioning its authenticity.

goldfish9776
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Homework Statement


what is the difference between the first and second question ? aren't they the same ?

Homework Equations

The Attempt at a Solution

 

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To me they are. What a strange block this is! More than 300 m high and only 50 kg !
This a real exercise in a real book or some kind of garbled home-made thingy ?
 
There is another type of motion that you can investigate other than sliding, namely tipping. That might be what part (a) is referring to.

It appears to me that the answers are switched. The answer listed for (b) seems to be the answer for (a) if you assume no sliding and only tipping.

The problem is odd. I don't think the block can be on the verge of tipping without also sliding.
 
TSny said:
There is another type of motion that you can investigate other than sliding, namely tipping. That might be what part (a) is referring to.

It appears to me that the answers are switched. The answer listed for (b) seems to be the answer for (a) if you assume no sliding and only tipping.

The problem is odd. I don't think the block can be on the verge of tipping without also sliding.

well , what s the condition for tipping ?
 
Your call ! At what angle does the thing keel over ?
 

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