A rescue plane wants to drop supplies to isolated mountain climbers on a rocky ridge 235 m below. The horizontal velocity ot the plane is 250 km / h (69.4 III/s). Rescue plane releases the supplies a horizontal distance of 425 m in advance of the mountain climbers. l 235 m Thrown downward? \" x x \\ -' '~ -.. Thrown upward? "I. ~.. \\ (Vyo > o) N h... K '5' \\ PmmA'r] I What vertical velocity (up or down) should the supplies be given so that they arrive precisely at the ciimbers' position (see the figure}? Express your answer with the appropriate units. I"