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23 Nov 2019
Two disk are mounted (like a merry go round) on low frictionbearings on the same axle and can be brought together so that theycouple and rotate as one unit. The first disk, with rotationalinertia 3.60 kg*mg^2 about its central axis, is spinningcounterclockwise at 450 revs/min. The second disk, with rotationalinertia 6.50 k*mg^2 is spinning clockwise at 900 revs/min. Theythen couple together
a) What is their resulting angular speed in radians per sec? Hint:the net external torque is zero.
b) What is their resulting kinetic energy in joules?
Two disk are mounted (like a merry go round) on low frictionbearings on the same axle and can be brought together so that theycouple and rotate as one unit. The first disk, with rotationalinertia 3.60 kg*mg^2 about its central axis, is spinningcounterclockwise at 450 revs/min. The second disk, with rotationalinertia 6.50 k*mg^2 is spinning clockwise at 900 revs/min. Theythen couple together
a) What is their resulting angular speed in radians per sec? Hint:the net external torque is zero.
b) What is their resulting kinetic energy in joules?
Irving HeathcoteLv2
16 Jun 2019
