JEE PHYSICS MCQ: GRAVITATION

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Application +4 | -1

If the earth were made of lead of relative density 11.3, what then would be the value of acceleration due to gravity on the surface of the earth? Radius of the earth

=6.4 \times 10^6 \mathrm{~m}

and

{G}=6.67 \times 10^{-11} \mathrm{Nm}^2 \mathrm{~kg}^{-2}

View answer and explanation

Correct option: A

22.21 \mathrm{~ms}^{-2}

Option A (

22.21 \mathrm{~ms}^{-2}

) is correct because it is the calculated value of acceleration due to gravity on the surface of the lead earth.

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. If the body is projected in a direction making an angle of

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with the vertical, the escape velocity will be The escape velocity of a body projected from the surface of earth is

v_e

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\theta

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