Amass weighing 64 lb is attached to a spring hanging from the ceiling and comes to rest at its equilibrium position. at time tequals0, an external force of upper f (t )equals3 cosine 5 t lb is applied to the system. if the spring constant is 10 lb/ft and the damping constant is 2 lb-sec/ft, find the steady-state solution for the system. use g equals 32 ft divided by sec squared.

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?