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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
- In a transistor, the value of βis 100, then the value of α will be
- A small object of uniform density rolls up a curved surface with an initial velocity
- The ionisation energy of an electron in the ground state of helium atom is 24.6 eV.
- A plane wave of wavelength 6250Å is incident normally on a slit of width 2×10⁻² cm.
- A spherical shell of radius 10cm is carrying a charge q. If the electric potential
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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