| ⇦ | 
| ⇨ |
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: - An amplifier has a voltage gain Av=1000. The voltage gain in dB is
- The angle of incidence at which reflected light is totally polarised for refraction
- A particle moves in a circle of radius 5 cm with constant speed and time period
- The innermost orbit of hydrogen atom has a diameter 1.06Å. The diameter of tenth
- 10 mA current can pass through a galvanometer of resistance 25 ohm.
Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An amplifier has a voltage gain Av=1000. The voltage gain in dB is
- The angle of incidence at which reflected light is totally polarised for refraction
- A particle moves in a circle of radius 5 cm with constant speed and time period
- The innermost orbit of hydrogen atom has a diameter 1.06Å. The diameter of tenth
- 10 mA current can pass through a galvanometer of resistance 25 ohm.
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