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. Which of the following will be σ if Y=2.4 η?
  2. A body of mass M hits normally a rigid wall with velocity V and bounces back
  3. Two bubbles A and B (A>B) are joined through a narrow tube. Then
  4. Periodic time of a satellite revolving above Earth’s surface at a height equal to R,
  5. The ratio of the weight of a man in a stationary lift and when it is moving downwards