I'm intrigued by the idea that if the disk slowly spins up to some speed greater than what is necessary to cause slippage, does the coin slip first radially or tangentially? If it accelerates quite quickly, it would be tangential (really the coin might just stand still while the disk accelerates underneath it). If it's accelerating very slowly, once it hits the critical omega the coin will slip radially, as calculated in this vid. I think.
hmm, so how to calculate the minimum acceleration required for the coin to slip tangentially? EDIT: I think the equation looks something like this: mu_s * m_coin * g = m_coin * a_min right?
Great vid, thnx. My perplexity with this is once friction has reached its limit; it seems that another force comes into play to pull it off; but that’s not the case , right? If the coin wasn’t moving ( along the surface) before , my intuition wants there to be a force moving it off. I still need to do more to understand this. Thanks 🙏
I'm intrigued by the idea that if the disk slowly spins up to some speed greater than what is necessary to cause slippage, does the coin slip first radially or tangentially? If it accelerates quite quickly, it would be tangential (really the coin might just stand still while the disk accelerates underneath it). If it's accelerating very slowly, once it hits the critical omega the coin will slip radially, as calculated in this vid. I think.
why do you ask such great questions? Your questions just make me want to do more physics.
hmm, so how to calculate the minimum acceleration required for the coin to slip tangentially?
EDIT: I think the equation looks something like this: mu_s * m_coin * g = m_coin * a_min right?
That is the exact question I was thinking. In case of an angular acceleration, what's the path the coin takes while slipping? (Assuming it slips)
would it be easier to use the acceleration vector in polar coordinates you think?
Great vid, thnx. My perplexity with this is once friction has reached its limit; it seems that another force comes into play to pull it off; but that’s not the case , right? If the coin wasn’t moving ( along the surface) before , my intuition wants there to be a force moving it off. I still need to do more to understand this.
Thanks 🙏
Just seen your centrifugal vs centripetal vid; thanks. Now I get it .. this ‘mystery’ centrifugal force is a fake force.
What if you glue the coin down?
What about if there is angular acceleration?