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

AI Thread Summary
When an object rolls off a tabletop, its vertical velocity is not necessarily zero at the moment it leaves the table, especially if it rolls along the edge. The assumption of zero vertical velocity typically applies when the table is level and the object drops straight down. However, if the object has a period of rolling at the edge, it may have some downward velocity upon departure. Context is crucial for a definitive answer, so sharing the specific question can clarify any assumptions. Understanding the dynamics of motion at the edge of the table is essential for accurate analysis.
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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