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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 transistor-oscillator using a resonant circuit with an inductor L
- For non-conductors, the energy gap is
- Two charged particles have charges and masses in the ratio 2:3 and 1:4 respectively.
- The horizontal and vertical components of earth’s magnetic field at a place
- A step down transformer is used on a 1000 V line to deliver 20 A at 120 V
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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