How fast must a plane fly along the earth\'s equator so that the sun stands stil

Question

How fast must a plane fly along the earth's equator so that the sun stands still relative to the passengers? Give your answer in both

km/h and mph.The radius of the earth is 6400 km.

part A

km/h

Express your answer using two significant figures.

part B

mph

Part C

In which direction must the plane fly, east to west or west to east?

How fast must a plane fly along the earth's equator so that the sun stands still relative to the passengers? Give your answer in both km/h and mph.The radius of the earth is 6400km. Express your answer using two significant figures. In which direction must the plane fly, east to west or west to east?

Explanation / Answer

The distance traveled in a complete revolution, suppose starting in Singapore and returning to Singapore:
d = 2*Pi*r

And the time taken:
T

Definition of speed:
v = d/T

Thus:
v = 2*Pi*R/T

Data:
R:=6400 km; T:=24 hr;

Result:
v=1675.51 kilometers per hour

=1041.11 miles per hour

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