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...

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