Stick-Slip with Chalk

  • #1
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What is the physics behind drawing dotted lines with chalk with just one stroke?
This is a video demonstrating this:


Here is what I currently have:
stickslip.png

as soon as the applied force exceeds that of the frictional, the block will accelerate. What makes it slip though? Because there is a jerk (change in acceleration) due to the difference between static and kinetic frictional forces?
 

Answers and Replies

  • #2
Andy Resnick
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<snip>What makes it slip though? Because there is a jerk (change in acceleration) due to the difference between static and kinetic frictional forces?

I don't think it's stick-slip behavior, it seems to be more complicated (a "frictional impact oscillator"):

http://www.mate.tue.nl/mate/pdfs/2323.pdf
 
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Likes Sho Kano and wrobel
  • #3
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can't do that on a dry erase board....just sayin'
 

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