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Question

An artificial satellite moving in circular orbit around the earth has a total ( kinetic + potential ) energy E0. Its potential energy and kinetic energy respectively are
  1. 2E0 and 2E0
  2. 2E0 and 3E0
  3. 2E0 and E0
  4. 2E0 and E0

A
2E0 and 2E0
B
2E0 and 3E0
C
2E0 and E0
D
2E0 and E0
Solution
Verified by Toppr

From the options itself it is clear that only in option C, when you add PE and KE i.e 2Eo+(Eo) we get Eo
Now
Total energy Eo=P.E+K.E=GMmR+12mv2
When we substitute v=GMR in K.E, we have K.E=GMm2R

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