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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
- The energy released by the fission of one uranium atom is 200 MeV.
- A thin semicircular conducting ring (PQR) of radius r is falling with its plane
- The de-Broglie wavelength of an electron having 80 eV of energy is nearly
- A particle moves along the x-axis such that its co-ordinate (x) varies with time (t)
- The turn ratio of a transformer is 1:2. An electrolytic dc cell of emf 2 volt is connected
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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