What is the magnitude of the current in the wire such that the loop is suspended, stationary. (does not fall due to gravity. ).

Ansa new gas is observed in the form of bubbles;

Gravity, from the center of mass of the box, extending downward normal force, from the floor under the box, extending upward, equal to gravity push force, acting at a point on the box, extending in the direction of motion friction, acting at any point on the box directly opposite the push, extending directly opposite to the motion