All of the planets stay near the ecliptic as they move on the celestial sphere

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

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?

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force