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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
- An electric bulb has a rated power of 50W at 100 V. if it used on an a.c. source
- The velocity of image when object and mirror both are moving towards each other
- The number of photo electrons emitted for light of a frequency v
- Two wires of the same dimensions but resistivities p1 and p2 are connected in series
- If the magnetising field on a ferromagnetic material is increased, its permeability
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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