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 CSS Forums Pace to keep up with the sun so you're never in darkness?

#1
Thursday, March 10, 2011
 Senior Member Join Date: Dec 2009 Location: City of Cockroaches & Bureaucrats Posts: 1,580 Thanks: 2,868 Thanked 2,347 Times in 1,010 Posts
Pace to keep up with the sun so you're never in darkness?

How fast do you have to go to keep up with the sun so you're never in darkness?
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Last edited by Shooting Star; Sunday, May 20, 2012 at 02:53 AM.
#2
Thursday, March 10, 2011
 Member Join Date: Feb 2011 Location: a village near Kharian Posts: 46 Thanks: 66 Thanked 15 Times in 13 Posts

Earth completes one cycle in 24 hours, i.e 360 degrees/24 hours,
Or in 1 hours, it rotates = 360/24 = 15 degrees
you may than find traveling speed by= 15/360 x circumference(40,075.16 kilometers)
=1669.7 km/h

Or alternately,
=(circumferernce)/(24)

=(2x3.142x6371)/(24)
=1668.1 km/h
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#3
Thursday, March 10, 2011
 40th CTP (PG) Join Date: Jun 2009 Location: Karachi/Islamabad Posts: 258 Thanks: 123 Thanked 162 Times in 122 Posts

Quote:
 Originally Posted by Shootingstar all the scientists of the forum plz answer his one... How fast do you have to go to keep up with the sun so you're never in darkness?
Basic Assumption:
You are running along a latitude line (parallel to equator)

Reason for Assumption:
You cant keep up with the sun nomatter how fast you run if you run perpendicular to the equator (along longitudes)

Anyhow, to be able to keep up with the sun, you must match the angular velocity of earth at that latitude line. As you near the poles (north or south) the normal velocity should decrease therefore we take into account the angular velocity which remains unchanged as it is define in rad/sec or rad/min.

Anyhow, this velocity should change with latitude and the velocity at equator is already derived in the above post.

all the Best~
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#4
Thursday, April 07, 2011
 Junior Member Join Date: Oct 2010 Location: shikarpur Posts: 11 Thanks: 15 Thanked 0 Times in 0 Posts

you have to move as fast as the Earth rotates

but in the opposite deriction

Last edited by Predator; Thursday, April 07, 2011 at 05:38 PM.

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