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The kinetic energy needed to project a body of mass m from the surface of earth (radius R) to infinity is
Options
(a) mgR/2
(b) 2mgR
(c) mgR
(d) mgR/4
Correct Answer:
mgR
Explanation:
The kinetic energy =1/2MVe²
The escape velocity Ve=√2gR
Ve²=2gR
= 2mgR/2
=mgR
Related Questions: - Thomson coefficient of a conductor is 10 µV/K. Its two ends are kept
- When the wavelength of sound changes from 1 m to 1.01 m,
- The second overtone of an open pipe is in resonance with the first overtone
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Thomson coefficient of a conductor is 10 µV/K. Its two ends are kept
- When the wavelength of sound changes from 1 m to 1.01 m,
- The second overtone of an open pipe is in resonance with the first overtone
- The speed of an electron having a wavelength of 10⁻¹⁰ m is
- The electric field part of an electromagnetic wave in a medium is represented by
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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