A playground merry-go-round has a radius R and a rotational inertia I. when the merry-go-round is at rest, a child with mass, m runs with speed, v along a line tangent to the rim and jumps on. the angular velocity of the merry-go-round is then;

Apossible explanation for a set of facts that can be tested by further investigation is called

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

Which best represents the law of conservation of mass ?