Aplane drops a rubber raft to the survivors of a shipwreck. the plane is flying at a height of 1960 m and with a speed of 109 m/s. the raft lands next to the survivors. ignoring air resistance, how far away from the shipwreck was the plane when the raft was dropped? (g = 9.8 m/s2) (round your answer to a whole number).

In this case the rubber raft has horizontal and vertical motion.

Considering vertical motion first.

We have displacement  , u = Initial velocity, t = time taken, a = acceleration.

In vertical motion

    s = 1960 m, u = 0 m/s, a = 9.81

So raft will take 20 seconds to reach ground.

Now considering horizontal motion of raft

u = 109 m/s, t = 20 s, a = 0

So

So shipwreck was 2180 meter far away from the plane when the raft was dropped.

b.a device that inputs heat into a cool object