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. A dip needle vibrates in a vertical plane perpendicular to magnetic meridian. The time
  2. A compass needle which is allowed to move in a horizontal plane
  3. If X=3YZ², find dimensions of Y if X and Z are the dimensions of capacity
  4. A bar magnet of pole strength 10 A-m is cut into two equal parts breadthwise.
  5. A point charge q is placed at a distance x/2 directly above the centre of a cube