A graph titled Position versus time for 3 runners with horizontal axis time (seconds) and vertical axis position (meters). A blue line labeled A has the greatest upward slope followed by an orange line labeled B followed by a green line labeled C. Lines A and B intersect 0 seconds 0 minutes while line C intersects the vertical axis at 0 seconds a positive distance above 0 meters.

Which runner had the fastest speed in the race?

Which runner had the slowest speed in the race?

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?