Physics help please!!!
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Physics help please!!!

[From: ] [author: ] [Date: 12-02-29] [Hit: ]
......
A planet like the earth has a radius of approximately
2460 mi, and one revolution per
day.
What is the linear speed of a rock on the
equator?
Answer in units of mi/h

-
2πr miles in 24 hours

speed = 2πr/ 24 = 2π*2460/24 = 644 mile/hour
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