AIEEE 2005 | Gravitation Question 174 | Physics

A particle of mass $$10$$ $$g$$ is kept on the surface of a uniform sphere of mass $$100$$ $$kg$$ and radius $$10$$ $$cm.$$ Find the work to be done against the gravitational force between them to take the particle far away from the sphere (you may take $$G$$ $$ = 6.67 \times {10^{ - 11}}\,\,N{m^2}/k{g^2}$$)

$$3.33 \times {10^{ - 10}}\,J$$

$$13.34 \times {10^{ - 10}}\,J$$

$$6.67 \times {10^{ - 10}}\,J$$

$$6.67 \times {10^{ - 9}}\,J$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

Average density of the earth

is a complex function of $$g$$

does not depend on $$g$$

is inversely proportional to $$g$$

is directly proportional to $$g$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

The change in the value of $$g$$ at a height $$h$$ above the surface of the earth is the same as at a depth $$d$$ below the surface of earth. When both $$d$$ and $$h$$ are much smaller than the radius of earth, then which one of the following is correct?

$$d = {{3h} \over 2}$$

$$d = {h \over 2}$$

$$d = h$$

$$d = 2\,h$$

AIEEE 2004

MCQ (Single Correct Answer)

-1

A satellite of mass $$m$$ revolves around the earth of radius $$R$$ at a height $$x$$ from its surface. If $$g$$ is the acceleration due to gravity on the surface of the earth, the orbital speed of the satellite is

$${{g{R^2}} \over {R + x}}$$

$${{gR} \over {R - x}}$$

$${gx}$$

$${\left( {{{g{R^2}} \over {R + x}}} \right)^{1/2}}$$

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