Two metal disks, one with radius = 2.53cm and mass = 0.780kg and the other with

Question

Two metal disks, one with radius = 2.53cm and mass = 0.780kg and the other with radius = 5.08cm and mass = 1.58kg , are welded together and mounted on a frictionless axis through their common center.

1) A light string is wrapped around the edge of the smaller disk, and a 1.50-kg block, suspended from the free end of the string. If the block is released from rest at a distance of 2.03 above the floor, what is its speed just before it strikes the floor?.

2) the calculation of part B, this time with the string wrapped around the edge of the larger disk.

Explanation / Answer

Conservation of energy: (0.5(I_1 + I_2)omega^2 + 0.5m(omega r)^2 = mgh) Substitute values to get 1 and 2!

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