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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 solid sphere, a hollow sphere and a ring are released from top of an inclined
- Two bulbs when connected in parallel to a source take 60W each, the power consumed,
- A boat taken 2h to travel 8km and back in still water.If the velocity of water 4 km/h
- In a parallel plate capacitor with plate area A and charge Q, the force on one plate
- Two resistances 3Ω and 6Ω are connected in parallel
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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