A coin is placed on a disc. The coefficient of friction between the coin and the disc is μ. If the distance of…

Question

A coin is placed on a disc. The coefficient of friction between the coin and the disc is $\mu$ . If the distance of the coin from the center of the disc is $r$ , the maximum angular velocity which can be given to the disc, so that the coin does not slip away, is:

A
$\frac{\mu g}{r}$
B
$\sqrt{\frac{r}{\mu g}}$
C
$\sqrt{\frac{\mu g}{r}}$
D
$\frac{\mu}{\sqrt{rg}}$

Accepted Answer

C. $$\sqrt{\frac{\mu g}{r}}$$

Answer

A. $$\frac{\mu g}{r}$$

Answer

B. $$\sqrt{\frac{r}{\mu g}}$$

Answer

D. $$\frac{\mu}{\sqrt{rg}}$$

Answer & step-by-step solution

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