Suppose a small plane can fly at 300 km/h [N] relative to the surrounding air. Suppose also that there is a 60 km/h [N] tailwind. How fast does the plane's shadow move across the ground?

1 Answer
Richard G.
Nov 16, 2015

360 km/h

Explanation:

SInce both the plane and the wind are going in the same direction, the speeds of both add.
If the plane was flying into the wind (a headwind), it would be slowed down, resulting in a ground speed of 240 km/h.

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