If link 1 moves with angular velocity $$\omega_1$$ and the second link moves with $$\omega_2$$ in the same direction. Which is the correct equation for rubbing velocity at a pin joint whose radius is r ?

A

$$\frac{(\omega_{1}-\omega_{2})}{r}$$

B

$$\frac{(\omega_{1}+\omega_{2})}{r}$$

C

$$(\omega_{1}-\omega_{2})r$$

D

$$(\omega_{1}+\omega_{2})r$$