Navigate

A satellite is revolving around the earth with a kinetic energy E. The minimum

A satellite is revolving around the earth with a kinetic energy E. The minimum addition of kinetic energy needed to make it escape from its orbit is

Options

(a) 2E
(b) 2/E
(c) E/2
(d) E

Correct Answer:

E

Explanation:

The potential energy of a satellite is negative and twice its kinetic energy. If it has to escape, it has to be given an additional energy to nullify the energy due to attraction.
E is the energy to be given so that the satellite can escape.

KA2002KL2008
admin:

Related Questions

  1. During mean life of a radioactive element, the fraction that disintegrates is
  2. In the series resonance the value of impedence is 3 Ω and the resistance is 4Ω,
  3. A resistor 30Ω, inductor of reactance 10 Ω and capacitor of reactance 10 Ω
  4. A vibrating string of certain length l under a tension T resonates with a mode
  5. An alpha nucleus of energy 1/2 mv² bombards a heavy nuclear target of charge Ze