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Two identical satellites are at 7R and R away from earth surface, the wrong statement is (R = Radius of earth)
  1. Ratio of total energy will be 4
  2. Ratio of potential energies will be 4
  3. Ratio of total energy will be 4 but ratio of potential and kinetic energies will be 2
  4. Ratio of kinetic energies will be 4


Solution

The correct option is C Ratio of total energy will be 4 but ratio of potential and kinetic energies will be 2
Orbital radius of satellites r1=R+R=2Rr2=R+7R=8RU1=GMmr1 and U2=GMmr2K1=GMm2r1 and K2=GMm2r2E1=GMm2r1 and E2=GMm2r2U1U2=K1K2=E1E2=4

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