STD-IX, QUIZ ON BASICS OF GRAVITATION, MCQs, CBSE

QUIZ ON LAW OF GRAVITATION

Quiz

 

1. The universal law of gravitation is the force law also known as the-
   1.   (a) triangular law
   2.   (b) square law
   3.   (c) inverse square law
   4.   (d) parallelogram law
2. Inverse square law means,
   1.   (a) ∝ r
   2.   (b) ∝ r-1
   3.   (c) ∝ r-2
   4.   (d) ∝ r2
3. The force of gravitation between two bodies does not depend on-
   1.   (a) their separation
   2.   (b) product of their masses
   3.   (c) sum of their masses
   4.   (d) gravitational constant
4. Force of attraction between two bodies does not depend upon-
   1.   (a) the shape of bodies
   2.   (b) the distance between their centres
   3.   (c) the magnitude of their masses
   4.   (d) both (b) and (c)
5. In the relation F=G ( Mm)/d^2 , the quantity G
   1.   (a) depends on the value of g at a place
   2.   (b) is used only when earth is one of the two masses
   3.   (c) is universal constant in nature
   4.   (d) is greatest at the surface of the earth
6. Force of attraction between two objects each of mass 1 kg and separated by 1 m is called-
   1.   (a) gravitational potential
   2.   (b) acceleration due to gravity
   3.   (c) gravitational field
   4.   (d) universal gravitational constant
7. The value of G depends on-
   1.   (a) masses of the bodies
   2.   (b) distance between the bodies
   3.   (c) both (a) and (b)
   4.   (d) None
8. Which of the following statements regarding gravitational force existing between two bodies is TRUE?
   1.   (a) first body exerts attractive force on second body while second body exerts repulsive force on first body
   2.   (b) the gravitational force is zero when they are kept in vacuum
   3.   (c) force exerted by the first body on second is not equal to the force exerted by second body on first
   4.   (d) force exerted by first body on second body is equal to the force exerted by second body on first
9. When an apple falls from a tree -
   1.   (a) only earth attracts the apple
   2.   (b) only apple attracts the earth
   3.   (c) both the earth and the apple attract each other
   4.   (d) none attracts each other
10. Two particles of mass m1 and m2, approach each other due to their mutual gravitational attraction only. Then-
    1.   (a) accelerations of both the particles are equal
    2.   (b) acceleration of the particle of mass m1 is proportional to m1
    3.   (c) acceleration of the particle of mass m1 is proportional to m2
    4.   (d) acceleration of the particle of mass m1 is inversely proportional to m1