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NEET2008PhysicsGravitationActual

For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is

Options

  1. A2
  2. B1 2
  3. C1 2
  4. D2

Correct answer

B. 1 2

Step-by-step solution

Key Idea : Kinetic energy of satellite is half of its potential energy. Potential energy of satellite U=- G M_e m R_e where R_e is radius of earth, M_e the mass of earth, m the mass of satellite and G the gravitational constant. |U|= G M_e m R_e Kinetic energy of satellite K= 1 2 G M_e m R_e Thus, K |U| = 1 2 G M_e m R_e R_e G M_e m = 1 2

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