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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
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- With what minimum acceleration can a fireman slide down a rope while breaking
- A particle moves along with x-axis.The position x of particle with respect to time
- A stone of mass 1 kg tied to a light inexensible string of length L=10/3 is whirling
- One milligram of matter on convertion into energy will give
- A particle of mass m is projected with a velocity v making an angle of 45°
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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