You're lying on the sand on a breezy day when a pesky fly wishes to join you. The breeze is blowing at a steady 1 m/s. If the fly wishes to land on you it should hover over you while flying
A) about 2 m/s relative to the breeze.
B) with the breeze at 1 m/s.
C) against the breeze at 1 m/s.
D) faster than 1 m/s but less than 2 m/s.
Answer: C
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A) It is larger. B) It is smaller. C) They are equal. D) The answer depends on the ratio of the masses. E) The answer depends on how fast they are moving.
Escape speed from Earth is
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