can someone help with these questions? Conservation of Angular Momentum pre-lab

Question

can someone help with these questions?

Conservation of Angular Momentum pre-lab Find the angular momenta below. Please include a magnitude as well as a sign and appropriate units. Find the angular momentum of a disk of moment of inertia It = 1.234 times 10-3 kg m2 rotating with an angular velocity of 2.5 rad/s counterclockwise. L1 = Find the angular momentum of a disk rotating with an angular velocity 1.03 rad/s clockwise, if its moment of inertia is I2 = 0.712 times 10-3 kg m2. L2 = The metal disks described above are initially spinning on cushions of air, in a standard rotational dynamics apparatus. Disk #1 is allowed to drop onto Disk #2 by removing the pin, and after a short time they are seen to spin at the same angular speed. Please include signs and units in your answers. What is the angular momentum of the system after the collision? LSYS = What is the final angular velocity of the two disks? omega =

Explanation / Answer

1)
a) angular momentum = Iw = 1.234*10^-3*2.5 = 0.003085 kgm^2 rad/sec
b) angular momentum = Iw = -0.712*10^-3*1.03 = -0.00073336 kgm^2 rad/sec
2)
a) final momentum = -0.00073336+0.003085 = 0.00235164 kgm^2 rad/sec
b) final angular velocity = 0.00235164/(1.234*10^-3 +0.712*10^-3) =1.208448098663926 rad/sec

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