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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 stone of mass 1kg is tied to a string 4m long and is rotated at constant speed
- The impurity atoms with which pure silicon may be doped to make it a p-type
- The approxiamate ratio of nuclear mass densities of ₇₉Au¹⁹⁷ and ₄₇ Ag¹⁰⁷ nuclei is
- To obtain a p-type semiconductor, germanium must be doped with
- A rectangular copper coil is placed in a uniform magnetic field of induction 40 mT
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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