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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
- The horizontal component of earth’s magnetic field at a place is 3×10⁻⁴ T
- The fossil bone has a ¹⁴C:¹²C ratio, which is [1/16] of that in a living animal
- A black body is at 727⁰C. It emits energy at a rate which is proportional to
- Length of a string tied to two rigid supports is 40 cm. Maximum length
- The force of repulsion between two electrons at a certain distance is F.
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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