science MCQs of gravitation (physics)

1)A body of mass 1kg is attracted by the earth with a force which is equal to

      a.  9.8N

      b.  6.67x 10¹¹

      c.  1 N

      d.  9.8m/s

2.  What is the gravitational force between two objects?

      a.  attractive at large distances only

      b.  attractive at small distances only

      c.  attractive at all distances

      d.  attractive at large distances but repulsive at small distances

3.  The value of ‘g’

      a.  Increases as we go above the earth’s surface

      b.  Decreases as we go to the centre of the earth

      c.  Remains constant

      d.  Is more at equator and less at poles

4.  The ball is thrown up, the value of ‘g’ will be

      a.  Zero

      b.  positive

      c.  negative

      d.  negligible

5.  The gravitational force causes

      a.  Tides

      b.  Motion of moon

      c.  None of them

      d.  Both a n b

6.  The mass of the body on moon is 40kg, what is the weight on the earth.

      a.  240kg

      b.  392N

      c.  240N

      d.  400kg

7.  Newton’s law of gravitation applies to

      a.  Small bodies only

      b.  Plants only

      c.  All bodies irrespective of their size

      d.  For solar system

8.  The gravitational force between two objects is F. If masses of both the objects are halved without altering the distance between them, then the gravitational force would become

      a.  f/4

      b.  f/2

      c.  f

      d.  2f

9.  The Earth attracts the moon with a gravitational force of 1020N. The moon attracts the earth with a gravitational force of

      a.  Less than 10²⁰N

      b.  10²⁰N

      c.  Greater than 10²⁰N

      d.  10-²⁰N

10.  The distance between two bodies becomes 6 times more than the usual distance. The the F becomes

      a.  36 times

      b.  6 times

      c.  12 times

      d.  1/36 times