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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: - Energy of photon whose frequency is 10¹² MHz will be
- A particle moves a distance x in time t according to equation x = (t + 5)⁻¹
- At place on earth, the vertical component of earth’s magnetic field is √3 times
- The wetability of a surface by a liquid depends primarily on
- Which is correct relation?
Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Energy of photon whose frequency is 10¹² MHz will be
- A particle moves a distance x in time t according to equation x = (t + 5)⁻¹
- At place on earth, the vertical component of earth’s magnetic field is √3 times
- The wetability of a surface by a liquid depends primarily on
- Which is correct relation?
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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