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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
Related Questions: - A thin rod of length L and mass M is held vertically with one end on the floor
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A thin rod of length L and mass M is held vertically with one end on the floor
- A transformer of 100% efficiency has 200 turns in the primary coil and 40000 turns
- Curie temperature above which
- A body of mass (4m) is lying in x-y plane at rest. It suddenly explodes into three
- The electric potential at the surface of an atomic nucleus (z=50) of radius
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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