Question

A rescue plane wants to drop supplies to isolated mountain climbers on a rocky ridge 235 m below.

Part A: If the plane is traveling horizontally with a speed of 256 km/h (71.1 m/s ), how far in advance of the recipients (horizontal distance) must the goods be dropped (see the figure

Answer: 492m

Part B: Suppose, instead, that the plane releases the supplies a horizontal distance of 425 m in advance of the mountain climbers. What vertical velocity (up or down) should the supplies be given so that they arrive precisely at the climbers' position (see the figure (b))? (vy0 =?)

Part C: With what speed do the supplies land in the latter case?