How will the potential energies of the object and the spring
compare after the distances are doubled?
The gravitational potential energy of the object will be
two times greater than the elastic potential energy of the
spring.
The elastic potential energy of the spring will be four
times greater than the gravitational potential energy of
the object
The elastic potential energy of the spring will be two
times greater than the gravitational potential energy of
the object
The potential energies will remain equal to one another.

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?