Write an expression in terms of the function p for the average velocity of the bike from t = 10 seconds to t = 60 seconds.

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?

What is the angular momentum of the bar about the axle?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up