8) Water drives a waterwheel (or turbine) of radius 3.1 m as shown in the figure (Figure 1). The water enters at a speed v1 = 7.2 m/s and exits from the waterwheel at a speed v2 = 3.7 m/s . Part A If 81 kg of water passes through per second, what is the rate at which the water delivers angular momentum to the waterwheel? Express your answer using two significant figures. (ΔL/Δt =?) Part B What is the torque the water applies to the waterwheel? Express your answer using two significant figures. Part C If the water causes the waterwheel to make one revolution every 6.0 ss , how much power is delivered to the wheel? Express your answer using two significant figures.

8) Water drives a waterwheel (or turbine) of radius 3.1 m as shown in the figure (Figure 1). The water enters at a speed v1 = 7.2 m/s and exits from the waterwheel at a speed v2 = 3.7 m/s . Part A If 81 kg of water passes through per second, what is the rate at which the water delivers angular momentum to the waterwheel? Express your answer using two significant figures. (ΔL/Δt =?) Part B What is the torque the water applies to the waterwheel? Express your answer using two significant figures. Part C If the water causes the waterwheel to make one revolution every 6.0 ss , how much power is delivered to the wheel? Express your answer using two significant figures.

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter5: Displacement And Force In Two Dimensions

Section: Chapter Questions

Problem 52A

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Part A

If 81 kg of water passes through per second, what is the rate at which the water delivers angular momentum to the waterwheel?

Express your answer using two significant figures.

(ΔL/Δt =?)

Part B

What is the torque the water applies to the waterwheel?

Express your answer using two significant figures.

Part C

If the water causes the waterwheel to make one revolution every 6.0 ss , how much power is delivered to the wheel?

Express your answer using two significant figures.

Definition Definition Product of the moment of inertia and angular velocity of the rotating body: (L) = Iω Angular momentum is a vector quantity, and it has both magnitude and direction. The magnitude of angular momentum is represented by the length of the vector, and the direction is the same as the direction of angular velocity.

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