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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
- Two waves represented by following equations are travelling in same medium
- A uranium nucleus ₉₂ U ²³⁸ emits an α-particle and a β-particle in succession.
- The electron drift speed is small and the change of the electron is also small
- If alpha, beta and gamma rays carry same momentum, which has the longest
- The time period of a simple pendulum in a lift descending with constant acceleration g is
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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