1)What is the magnitude of the angular momentum of the spinning disk? 2) 3) 5.8

Question

1)What is the magnitude of the angular momentum of the spinning disk?

2)

3)

5.8 kg and radius R = 0.46 m hangs from a rope attached to the ceiling. The disk spins on its axis at a distance r = 1.41 m from the rope and at a frequency f = 18.4 rev/s (with a direction shown by the arrow). What is the magnitude of the angular momentum of the spinning disk? Your submissions: Computed value: 3.09 Submitted: Wednesday, November 13 at 7:04 PM Feedback: What is the torque due to gravity on the disk? What is the period of precession for this gyroscope?

Explanation / Answer

1) angular miomentum L=I*w....

here i is moment of inertia I=m*r^2/2=0.613kg.m^2.......

w is angular frequency w=2*pi*f=115.62........

L=I*w=70.87kgm^2s^-1

2) Torque is T=r X F=1.41*mg*sin(90)=80.15 N.m

3)Period is T=1/f=1/18.4=0.05434 sec

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