How does Singer argument works with " Famine, Affluence, and Morality

In a load, the load is paralel to the shaft. n a. angular n b. thrust n c radial n d. none of the above

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

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?