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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 half life of radium is 1620 yr and its atomic weight is 226 kg per kilo mol.
- A particle moves along the x-axis from x=0 to x=5 m under the influence of a force
- A nucleus at rest splits into two nuclear parts having radii in the ratio 1:2.
- A ballet dancer, dancing on smooth floor, is spinning about a vertical axis
- Calculate power output of ₉₂²³⁵U reactor, if it takes 30 days to use up 2 kg of fuel,
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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