The power of a bus engine is transmitted using the belt-and-pulley arrangement shown. The engine turns pulley A at

ωA = 30 rad/s clockwise. The hub at D is rigidly connected to B and turns with it.

Part A

Determine the angular velocity of the generator pulley B, measured clockwise.

Express your answer using three significant figures. Enter positive value if the angular velocity is clockwise and negative value if the angular velocity is counterclockwise.

ωB =

90.0

rad/s

Part B

Determine the angular velocity of the air-conditioning pulley C, measured clockwise.

Express your answer using three significant figures. Enter positive value if the angular velocity is clockwise and negative value if the angular velocity is counterclockwise.

ωC =

180

rad/s