Homework Help: Geometry

Posted by Skye on Sunday, January 23, 2011 at 2:14pm.

A satellite in a nearly circular orbit is 2000 km above Earth's surface. The radius of Earth is approximately 6400 km. If the satellite completes its orbit in 112 hours, calculate the speed of the satellite in kilometers per hour.

Please help me. I have a math test tomorrow.

Geometry - Henry, Monday, January 24, 2011 at 4:16pm
d = C = 6.28*r=6.28*6400km = 40212.4km.
C = Circumference.

V = d/t = 40212.4km / 112h = 359km/h.

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