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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: - The potential energy of a simple harmonic oscillator when the particle is half way
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The potential energy of a simple harmonic oscillator when the particle is half way
- The electron of a hydrogen atom revolves round the proton in a circular
- The earth is assumed to be a sphere of radius R. A platform is arranged at a height R
- At what distance from the centre of earth, the value of acceleration due to gravity
- A light emitting diode(LED) has a voltage drop of 2 volt across it
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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