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23 Nov 2019
A solid disk rotates in the horizontal plane at an angular velocityof 0.047 rad/s with respect to an axis perpendicular to the disk atits center. The moment of inertia of the disk is 0.14 kg · m2. Fromabove, sand is dropped straight down onto this rotating disk, sothat a thin uniform ring of sand is formed at a distance of 0.40 mfrom the axis. The sand in the ring has a mass of 0.50 kg. Afterall the sand is in place, what is the angular velocity of thedisk?
1 rad/s
A solid disk rotates in the horizontal plane at an angular velocityof 0.047 rad/s with respect to an axis perpendicular to the disk atits center. The moment of inertia of the disk is 0.14 kg · m2. Fromabove, sand is dropped straight down onto this rotating disk, sothat a thin uniform ring of sand is formed at a distance of 0.40 mfrom the axis. The sand in the ring has a mass of 0.50 kg. Afterall the sand is in place, what is the angular velocity of thedisk?
1 rad/s
Irving HeathcoteLv2
21 May 2019
