A wind turbine farm can be used to generate significant amounts of electricity.

Question

A wind turbine farm can be used to generate significant amounts of electricity. As you pass the wind turbine farm on a windy day you notice that the three-bladed propellers are all rotating clockwise at a constant speed From this observation you conclude

A.that the wind is exerting zero torque on the turbine blades, while the NET torque on the turbine blades is clockwise.

B.that the wind is exerting zero torque on the turbine blades, while the NET torque on the turbine blades is also zero.

C.that the wind is exerting a clockwise torque on the turbine blades, and the NET torque on the turbine blades is clockwise.

D.that the wind is exerting a clockwise torque on the turbine blades, and the NET torque on the turbine blades is zero.

A.that the wind is exerting zero torque on the turbine blades, while the NET torque on the turbine blades is clockwise.

B.that the wind is exerting zero torque on the turbine blades, while the NET torque on the turbine blades is also zero.

C.that the wind is exerting a clockwise torque on the turbine blades, and the NET torque on the turbine blades is clockwise.

D.that the wind is exerting a clockwise torque on the turbine blades, and the NET torque on the turbine blades is zero.

Explanation / Answer

D.that the wind is exerting a clockwise torque on the turbine blades, and the NET torque on the turbine blades is zero.

because, as the turnbine is rotating with constant angular velocity, the net torque on the turbine must be zero.

here frictional forces in the barings exert same amount of torque in the opposite direction and net torque becomes zero.

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