The velocity is the time derivative of the displacement v r To find the time interval it takes for the displacement of the object to go from = tR r RE to = 2 is found by integration of the above equation where the lower limits are r RE (t = 0 = and the upper limits are (t = = 2 r RE) tR r RE) QED
The velocity v is the time derivative of the displacement r To find the time interval tR it takes for the displacement of the object to go from r = RE to r = 2 RE is found by integration of the above equation where the lower limits are (t = 0 r = RE) and the upper limits are (t = tR r = 2 RE) QED
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