Gravity Quiz for Fun & Quiz Competition Practice

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#1. What's the escape velocity for a particle to escape the gravitational field of earth?

#2. Which of the following statements is true?

#3. Which of the following is true for gravitational force?

#4. Unit of universal gravitational constant is

#5. Which is a statement of Kepler's second law?

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Explanation is given below

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Gravity Quiz Explanations

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  1. Escape velocity for a body to escape the
    gravitational field of earth is 11.2 km per second
    (kps). Don’t confuse it with kph as that’s km per
    hour which is, in fact, very slow for an escape
    velocity.
  2. All statements are true.
  3. Gravitational force is a conservative force.
    Therefore, the work done by it is path
    independent.
  4. F = GMm/(r^2)
    or, G = F.(r^2)/Mm
    So, the unit is N.(m^2)/(kg^2).
  5. Kepler’s 2nd law (Law of areas) states that
    the speed of the planet is minimum when it is
    farthest from the sun. It is maximum when the
    planet is closest to the sun.
  6. SI unit of gravitational potential is joule/kg.
    So, its CGS unit is erg/gram.
  7. All the planets move in elliptical orbits with
    the sun situated at one of the foci of the ellipse,
    according to Kepler’s 1st law of planetory
    motion (law of orbits).
  8. The product of gravitational potential and
    mass of the body gives gravitational potential
    energy.
  9. The value of G was given by scientist Henry
    Cavendish in 1798.
  10. Graviton is the hypothetical particle that is
    supposed to be mediating the gravitational
    interaction, which is the weakest interaction of
    all the four fundamental forces.

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Uploaded by Bhautik Kapadiya 

Gravitation Quiz and answers

  1. What’s the escape velocity for a particle to
    escape the gravitational field of earth?
    a. 11.2 kph
    b. 9.8 kph
    c. 11.2 mps
    d. 11.2 kps ()
  2. Which of the following statements is true?
    a. escape speed is independent of projection
    of the body from the surface of the planet
    b. escape speed is dependent on the mass of
    the planet
    c. escape speed is independent of the mass of
    the body that is projected
    d. all of the above ()
  3. Which of the following is true for gravitational
    force?
    a. it’s not a conservative force
    b. it depends on the nature of the intervening
    medium
    c. work done by this force is path
    independent ()

d. none of the above

  1. Unit of universal gravitational constant is
    a. N (m^-2) (kg^2)
    b. N (m^2) (kg^-2) ()
    c. J m (kg^-3)
    d. erg cm kg^-1
  2. Which is a statement of Kepler’s second law?
    a. speed of the planet is minimum when it is
    farthest from the sun ()
    b. speed of the planet is maximum when it is
    farthest from the sun
    c. speed of the planet is minimum when it is
    closest to the sun
    d. none of the above
  3. What is the CGS unit of gravitational
    potential?
    a. dyne/ gram
    b. erg/ gram ()
    c. erg/ cm
    d. dyne.cm.gram
  4. All the planets move in _ orbits around
    the sun.
    a. parabolic
    b. circular
    c. hyperbolic
    d. none of the above ()

  1. Gravitational potential energy is _
    a. gravitational potential X mass of the body
    ()
    b. gravitational potential X radius of the body
    c. gravitational potential/ mass of the body
    d. none of the above
  2. The value of universal gravitational constant
    G was determined experimentally by
    __ .
    a. Isaac Newton
    b. Galileo Galilei
    c. Henry Cavendish ()
    d. Johannes Kepler
  3. Which of the following particles is the carrier
    of gravitational interaction?
    a. gluon
    b. muon
    c. higgs boson
    d. none of the above ()
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