A 100-kg motor and generator set is mounted on rubber pads that deflect 3 mm under the static weight of the set. The rated speed of the motor is 1800 rpm, and at that speed the set vibrates with an amplitude of 0.05 mm. What would be the amplitude of motion if the motor generator set is mounted on a 300-kg block of concreate, which is then mounted on the same rubber pads

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?