When calculating the mechanical advantage of a lever, what two pieces of information are needed?
a. the mass of the object being moved and the length of the effort arm
b. the length of the effort arm and the length of the resistance arm
c. the length of the resistance arm and the amount of effort needed to move the object
d. the length of the resistance arm and the amount of resistance force that is exerted

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?

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

For which pair of objects would adding the same a