Question types

7. gravitation question types

857 questions across 1 question group — pick any mix to generate a Physics paper with step-by-step answer keys.

857
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1
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Sample Questions

7. gravitation questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

The minimum energy required to launch a satellite of mass $m$ from the surface of earth of mass $M$ and radius $R$ in a circular orbit at an altitude of $2 R$ from the surface of the earth is:
  • A
    $\frac{2 G m M}{3 R}$
  • B
    $\frac{G m M}{2 R}$
  • C
    $\frac{G m M}{3 R}$
  • $\frac{5 G m M}{6 R}$

Answer: D.

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The mass of a planet is $\frac{1}{10}^{\text {th }}$ that of the earth and its diameter is half that of the earth. The acceleration due to gravity on that planet is:
  • A
    $9.8 \mathrm{~m} \mathrm{~s}^{-2}$
  • B
    $4.9 \mathrm{~m} \mathrm{~s}^{-2}$
  • $3.92 \mathrm{~m} \mathrm{~s}^{-2}$
  • D
    $19.6 \mathrm{~m} \mathrm{~s}^{-2}$

Answer: C.

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Two bodies of mass $m$ and $9 m$ are placed at a distance $R$. The gravitational potential on the line joining the bodies where the gravitational field equals zero, will be ( $G=$ gravitational constant) :
  • A
    $-\frac{20 G m}{R}$
  • B
    $-\frac{8 G m}{R}$
  • C
    $-\frac{12 G m}{R}$
  • $-\frac{16 G m}{R}$

Answer: D.

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A satellite is orbiting just above the surface of the earth with period $T$. If $d$ is the density of the earth and $G$ is the universal constant of gravitation, the quantity $\frac{3 \pi}{G d}$ represents :
  • A
    $\sqrt{T}$
  • B
    $T$
  • $T^2$
  • D
    $T^3$

Answer: C.

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In a gravitational field, the gravitational potential is given by, $V =-\frac{ K }{ x }( J / kg )$. The gravitational field intensity at point $(2,0,3)\,m$ is
  • A
    $+\frac{ K }{2}$
  • B
    $-\frac{ K }{2}$
  • $-\frac{K}{4}$
  • D
    $+\frac{K}{4}$

Answer: C.

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