How much work is done by gravity when a pine cone (of mass 50g) falls from the top of a tree, 9 m high?

Ascientific blank must be testable and capable of being proven false?

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

Am i correct on these two physics questions?