Mass of the earth is M and its radius is R. An object of mass m is placed on the surface of earth. Find the work done in lifting the object through a height \(\frac{R}{2}\) above the surface of earth.

\(\frac{{2{\rm{\;}}GMm}}{{3R}}\)

Mass of the earth is M and its radius is R. An object of mass m is pla

1.	Mass of the earth is M and its radius is R. An object of mass m is placed on the surface of earth. Find the work done in lifting the object through a height \(\frac{R}{2}\) above the surface of earth.
A.	\(\frac{{GMm}}{{2R}}\)
B.	\(\frac{{GMm}}{{3R}}\)
C.	\(\frac{{2{\rm{\;}}GMm}}{{3R}}\)
D.	\(\frac{{GMm}}{{4R}}\)
Answer» C. \(\frac{{2{\rm{\;}}GMm}}{{3R}}\)

Discussion

No Comment Found

Related MCQs

In a vacuum, a five-rupee coin, a feather of a sparrow bird and a mango are dropped simultaneously from the same height. The time taken by them to reach the bottom is t1, t2 and t3 respectively. In this situation, we will observe that
If the acceleration due to gravity is 12.6 m/s2 on a planet of 1/7th the mass of earth, then what must be its radius as compared to 'R', the radius of the earth?
A satellite moves around the earth in a circular orbit of radius R centered at the earth. A second satellite moves in an elliptical orbit of major axis 8R, with the earth at one of the foci. If the former takes 1 day to complete a revolution, later would take
Every object in the universe attracts every other object. This force is called _________.
Geostationary orbit is at a height of approx ___________.
If a body of mass 'm' moves in a circular orbit of radius 'a' about another body of mass 'M', where M >> m, then total energy of the system is ____________.
A particle starts from origin O from rest and moves with a uniform acceleration along the positive x-axis. Identify all figures that correctly represent the motion qualitatively. (a = acceleration, v = velocity, x = displacement, t = time).A.B. C. D.
In a simple pendulum experiment for determination of acceleration due to gravity (g), time taken for 20 oscillations is measured by using a watch of 1 second least count. The mean value of time taken comes out to be 30 s. The length of pendulum is measured by using a meter scale of least count 1 mm and the value obtained is 55.0 cm. The percentage error in the determination of g is close to:
_____ argued that all planets are in the Sun's orbit, not Earth's, contrary to the belief of the time.
In 2009, TerreStar-1 was launched for better communication to North America. From which country was it launched?A. FranceB. AmericaC. ChinaD. Russia

Mass of the earth is M and its radius is R. An object of mass m is placed on the surface of earth. Find the work done in lifting the object through a height \(\frac{R}{2}\) above the surface of earth.

Discussion

No Comment Found

Related MCQs

Reply to Comment