I need help I'm failing at school

the last one this is were I got my info that clued me in for my

Explanation:

"The center of gravity is the point through which the force of gravity acts on an object or system. In most mechanics problems the gravitational field is assumed to be uniform. The center of gravity is then in exactly the same position as the center of mass ."

Hope this helps ∞<3 P.S~ Hope you don't fail school :<

let me know if this is right or wrong...

small = small current large mag large current

i think it's 35 meters