Time required to reach to Speed of Roller table for a bar

AI Thread Summary
The discussion focuses on calculating the time required for a bar to accelerate from 10 meters per second to 20 meters per second on a roller table after being cut. The roller table's initial speed is 20 meters per second, while the bar initially moves at 10 meters per second and slips due to friction. The coefficient of friction is specified as 0.5, which is crucial for determining the acceleration of the bar. Participants are encouraged to share their attempts and challenges in formulating the friction factor affecting the bar's speed. Understanding the relationship between mass, acceleration, and friction is essential for solving the problem.
Kaustubh
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Homework Statement



If rolling mill is running at 10 meters per second and roller table after mill is running at 20 meters per second.
Before cutting of bar, it will move at 10 meters per second.

Before cutting, roller table is trying to pull the bar, but since bar is not cut, it will slip on roller.

After cutting, bar has to move with the speed of 20 meters per second on roller table.
How much time bar will take to reach to that speed?

Coiff of friction of roller is 0.5

Homework Equations



F = Mass x a.
Coiff of friction x g = a
 
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Welcome to PF!

Hi Kaustubh! Welcome to PF! :wink:

Show us what you've tried, and where you're stuck, and then we'll know how to help! :smile:
 
Hi there,
I am unable to formulate the friction factor, which will affect speed of bar after cutting.
 
I don't understand …

the coefficient of friction is given as 0.5 :confused:
 

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