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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
- A conductor of length 5 cm is moved parallel to itself with a speed of 2 m/s,
- If the focal length of objective lens is increased, then magnifying power of
- A beam of light of λ=600 nm from a distant source falls on a single slit 1 mm wide
- A charged particle of mass m and charge q moves along a circular path of radius
- In nuclear fission, the percentage of mass converted into energy is about
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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