A 15 kg uniform disk of radius R = 0.25 m has a string wrapped around it, and a m = 4.2 kg weight is hanging on the string. The system of the weight and disk is released from rest.
1)
When the 4.2 kg weight is moving with a speed of 1.8 m/s, what is the kinetic energy of the entire system?
K.E. =
J
2)
If the system started from rest, how far has the weight fallen?
h fall =
m
3)
What is the angular acceleration at this point?
α =
https://www.flipitphysics.com/Content/smartPhysics/Media/Images/Phys101/08/diskwithweight.gif
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