Two disks are located on an axle as shown in Figure P9.46. The lower disk is initially

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Two disks are located on an axle as shown in Figure P9.46. The lower disk is initially spinning at 50 rad/s, and the upper one is not spinning. The upper disk then falls onto the lower disk, and they stick together.?

(a) Is there a torque on the lower disk? On the upper disk??

(b) Identify a system for which the external torque is zero so that the angular momentum is conserved.?

(d) What is the final angular momentum of your system? Express your answer in terms of ?_f, the final angular velocity of the two disks.?

(e) Find ?_f.

Figure P9.46

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College Physics Reasoning and Relationships

ISBN: 978-0840058195

2nd edition

Authors: Nicholas Giordano

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Question Posted: Jan 21, 2019 07:56 AM

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Two disks are located on an axle as shown in Figure P9.46. The lower disk is initially

Question:

m2 = 7.0 kg R2 = 1.0 m m1 = 20 kg R1 = 2.0 m Wf = ? Initial position Final position

Step by Step Answer:

The angular momentum of the two disks before they collide is conserved after they stick together No ...View the full answer

College Physics Reasoning and Relationships

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