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7. gravitation — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics7. gravitation1 Mark
MCQ
The acceleration of a body due to the attraction of the earth (radius $R$) at a distance $2 \,R$ from the surface of the earth is ($g =$ acceleration due to gravity at the surface of the earth)
  • ✓
    $\frac{g}{9}$
  • B
    $\frac{g}{3}$
  • C
    $\frac{g}{4}$
  • D
    $g$
✓

Answer

Correct option: A.
$\frac{g}{9}$
a
(a) $g' = g\,{\left( {\frac{R}{{R + h}}} \right)^2} = g\,{\left( {\frac{R}{{R + 2R}}} \right)^2} = \frac{g}{9}$

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