a roller coaster is at the top of a 72m hill and weighs 134 kg. the coaster (at this moment) has potential energy. calculate it

they should be similar or the same

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach

explanation:

wheres the pic