I don\'t need the answer I just want to know what type of problem this is and th

Question

I don't need the answer I just want to know what type of problem this is and the physics behind it.
2. (20 pts.) A uniform disk with a diameter of 2.40 m and mass 80.0 kg rotates with very 2. little friction in a horizontal plane about a vertical axis through its center at 26.0 rp second disk with diameter 2.00 m and mass 30.0 kg and initially at rest (that is, not rotating) is dropped onto the first so that afterwards they both rotate together about their centers. (a) Find the final angular speed of the system. 6.0 rpm. A 26.orPm = S. 72 rps 23.7 b) This is expected to be an inelasti collision. Prove it. (b) This is expected to be an inelastic collision. Prove it.

Explanation / Answer

in this process there is no external torque about the axis

so angular momentum will be conserved

iniitally

I1 = (MR^2)/2

finally

I2 = (M1R1^2 /2) + (m2r2^2 /2)

I1 * w1 = I 2 w2

given I1, I2, w1

we can find out w2

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