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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: - In nuclear fission, the percentage of mass converted into energy is about
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In nuclear fission, the percentage of mass converted into energy is about
- The ionization energy of Li⁺⁺ is equal to
- The number of beta particles emitted by a radioactive substance is twice the number
- Two satellites of earth, S₁ and S₂ are moving in the same orbit. The mass of S₁
- When the wave of hydrogen atom comes from infinity into the first orbit,
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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