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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 total kinetic energy of a body of mass 10 kg and radius 0.5 m moving with a velocity
- If the focal length of a concave mirror is 50 cm, then where should the object
- A charged oil drop is suspended in a uniform field at 3×10⁴ V/m so that it neither falls
- The radius of curvature of the convex face of a plano-convex lens is 12 cm
- A current is flowing through resistance. A potential difference of 120 V
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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