Distance of geostationary satellite from the surface of the earth radius (Re=6400 km) in terms of Re is

(a) 13.76 Re                         (b) 10.76 Re

(c) 6.56 Re                            (d) 2.56 Re

Concept Questions :-

Please attempt this question first.

Difficulty Level:


Energy required to move a body of mass m from an orbit of radius 2R to 3R is

(a)    GMm/12R2                (b)    GMm/3R2

(c)     GMm/8R                  (d)     GMm/6R

Concept Questions :-

Gravitational potential energy
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


If radius of the earth contracts by 2% and its mass remains the same, then weight of the body at the earth surface :

(a)     Will decrease                       (b)  Will increase

(c)   Will remain the same              (d)  None of these

Concept Questions :-

Acceleration due to gravity
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The kinetic energy needed to project a body of mass m from the earth surface (radius R) to infinity is -

(a)   mgR/2                 (b)  2 mgR

(c)   mgR                    (d)   mgR/4

Concept Questions :-

Escape velocity
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


A satellite is to revolve round the earth in a circle of radius 8000 km. The speed at which this satellite be projected into an orbit, will be 
(a) 3 km/s                      (b) 16 km/s

(c) 7.15 km/s                   (d) 8 km/s

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


If mass of a body is M on the earth surface, then the mass of the same body on the moon surface is

(a)  M/6       (b)  Zero

(c)  M          (d)   None of these

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Radius of orbit of satellite of earth is R. Its kinetic energy is proportional to -

(a) 1R                       (b) 1R

(c) R                         (d)  1R3/2

Concept Questions :-

Gravitational potential energy
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


A particle falls towards earth from infinity. It’s velocity on reaching the earth would be -

(a)   Infinity                   (b) 2gR

(c)   2gR                    (d)  Zero

Concept Questions :-

Escape velocity
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Two satellite A and B, ratio of masses 3 : 1 are in circular orbits of radii r and 4r. Then ratio of total mechanical energy of A to B is 

(a) 1 : 3                             (b) 3 : 1

(c) 3 : 4                             (d) 12 : 1

Concept Questions :-

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The orbital velocity of a planet revolving close to earth's surface is 

(a) 2gR               (b) gR

(c) 2gR                (d) gR  

Concept Questions :-

Orbital velocity
Please attempt this question first.

Difficulty Level: