- #1

Bonbon32

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- Homework Statement
- A disk of mass M and angular speed w falls into table top. The kenetic coffienet of friction from table top is meu. Create an equation for dt=dr *F. Using this information.

- Relevant Equations
- Menu kenetic Mg = Friction

Iaplha = torque

Fr = torque

Not sure how they obtained an answer of (2meukenetic *Mg/R^2)*r^2 dr = dt

When they say disk I am assuming it's not ring shaped. So since F * Dr= DT where I guess F acting on a small point on the disc is constant from the table top. And Dr is the variable distance from a random small point from the axis which summed together times force give total torque. I plug in F friction using mgmeu. Not to sure where to go from there.

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