- Gear A rotates clockwise.
- Angular velocity of gear A, $\omega_A = 20\pi$ rad/s.
- Radius of gear A, $r_A = 2$ in. (from the diagram, the diameter is 4 in., so radius is 2 in.).
- Radius of gear B, $r_B = 4$ in. (from the diagram, the diameter is 8 in., so
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