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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.
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A very small circular loop of radius a is initially (at t=0) coplanar and concentric
- If the self inductance of 500 turn coil is 125 mH, then the self inductance
- A pellet of mass 1 g is moving with an angular velocity of 1 rad/s along a circle
- Two bodies A and B have masses 20 Kg and 5 Kg respectively. Each one is acted
- A block of 2 kg is kept on the floor. The coefficient of static friction is 0.4
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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