A 3m diameter merry-go-round with a mass of 250kg is spinning at 20 rpm. John runs tangent to the merry-go-round at 5m/s, in the same direction that it is turning, and jumps onto the outer edge. John's mass is 30kg. What is the merry-go-round's angular velocity, in rpm, after John jumps on?

A skater is spinning at 1 rev/s with her arms outstretched so that her moment of inertia is2.4 kg.m2 . She then pulls her arms to her sides which reduces her moment of Inertia to 1.2 kg.m2. What is her new angular velocity?

A 97.9 kg97.9 kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.55 rad/s1.55 rad/s. A monkey drops a 9.51 kg9.51 kg bunch of bananas vertically onto the platform. They hit the platform at 4545 of its radius from the center, adhere to it there, and continue to rotate with it. Then the monkey, with a mass of 20.5 kg20.5 kg, drops vertically to the edge of the platform, grasps it, and continues to rotate with the platform. Find the angular velocity of the platform with its load. Model the platform as a disk of radius 1.73 m1.73 m.

Two small 0.55-kg masses are attached to opposite ends of a very lightweight rigid rod 0.7 m long. The system is spinning in a horizontal plane around a vertical axis perpendicular to the rod located halfway between the masses. Each mass is moving in a circle of radius 0.35 m at a speed of 0.85 m/s. What is the total angular momentum of this system? kg-m²/s Need Help? Read It