If an object rolls off a tabletop is the vertical velocity initially 0?

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Discussion Overview

The discussion revolves around the initial vertical velocity of an object that rolls off a tabletop. Participants explore the conditions under which the object departs the table, considering factors such as the table's levelness and the object's motion at the edge.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested, Homework-related

Main Points Raised

  • Some participants question whether the table is level at the point the object departs, suggesting that this could affect the vertical velocity.
  • One participant notes that there is a period where the object could "roll" on the edge, indicating that its vertical velocity may not be zero at the moment it loses contact with the table.
  • Another participant suggests that in a typical homework context, it is likely safe to assume the initial vertical velocity is zero, but emphasizes the need for the specific question to confirm this.
  • There is a call for participants to provide their own thoughts and context before seeking explanations, indicating a desire for deeper engagement in the discussion.

Areas of Agreement / Disagreement

Participants do not reach a consensus on whether the initial vertical velocity is zero, as there are competing views regarding the conditions of the table and the object's motion at the edge.

Contextual Notes

The discussion highlights the importance of assumptions regarding the table's levelness and the object's behavior at the edge, which remain unresolved.

Henrybar
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Please explain!
 
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Is the table level at the point the object departs?
 
There's a period of time where the object could "roll" on the edge, and its vertical veloctiy would not be zero at the moment it loses contact with the table.
 
If you are asking because you have seen it in a homework question then yes, they probably do mean (or it's safe to assume) the initial vertical velocity is zero.

To be sure you would have to post the question in case there is more to it.
 
Henrybar said:
Please explain!

How about you explain what you think, and tell us the context of the question, before asking us to do your thinking for you? ;)
 

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