Billy pulls his friend sue on a sled at a constant velocity with a horizontal force of 200 n. the weight of the sled and sue is 400 n. which way will the sled move if billy suddenly starts to pull with a force of 600 n?

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?