| ⇦ | 
| ⇨ |
A particle of masses m is thrown upwards from the surface of the earth, with a velocity u. The mass and the radius of the earth are, respectively, M and R. G is gravitational constant and g is acceleration due to gravity on the surface of the earth. The minimum value of u so that the particle does not return back to earth, is
Options
(a) √( 2GM / R)
(b) √( 2GM / R)²
(c) √( 2G R²)
(d) √( 2GM / R)²
Correct Answer:
√( 2GM / R)
Explanation:
The velocity u should be equal to the escape velocity. That is, u = √(2gR)
But g = GM / R² ⇒ u = √(2 . GM / R² . R)
√( 2GM / R)
Related Questions: - A round uniform body of radius R, mass M and moment of inertia I rolls down
- The following four wires are made of the same material. Which of these will have
- A plane wave of wavelength 6250Å is incident normally on a slit of width 2×10⁻² cm.
- The magnetic susceptibility does not depend upon the temperature in
- A beam of light of wavelength 590 nm is focussed by a converging lens of diameter
Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A round uniform body of radius R, mass M and moment of inertia I rolls down
- The following four wires are made of the same material. Which of these will have
- A plane wave of wavelength 6250Å is incident normally on a slit of width 2×10⁻² cm.
- The magnetic susceptibility does not depend upon the temperature in
- A beam of light of wavelength 590 nm is focussed by a converging lens of diameter
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply