Gravitation Test

Gravitation

This is Gravitation Test-02 for CBSE class 09 Science.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which of the following phenomena is not due to gravitational force?
  • A
    tides in ocean
  • B
    rain fall and snowfall.
  • C
    movement of satellites around planets.
  • D
    All of these
    Correct
2
Statement A: Polar radius is 6357km and equatorial radius is 6378km, Statement B: At a given place the weight of an object is equal to mass of the object Which of the two statement is true?
  • A
    neither a nor b
  • B
    statement B
  • C
    both a and b
  • D
    statement A
    Correct
3
Gravitation force is a
  • A
    weakest force
    Correct
  • B
    short range force
  • C
    strongest force
  • D
    non-central force
4
Statement A: The Earth attract the moon with a force greater than the force with which the moon attracts the Earth. Statement B: The mass and weight of a body becomes O at the centre of the Earth. Which of the two statement is true?
  • A
    statement B
  • B
    both the statements A and B
  • C
    neither statement A nor B.
    Correct
  • D
    statement A
5
Force of gravitation A Directly proportional to the product of masses of two objects B Inversely proportional to the product of masses of two objects C Directly proportional to the square of distance between two objects D Inversely proportional to the square of distance between two objects
  • A
    (b) and (c) are correct
  • B
    All of these
  • C
    (a), (b) and (c) are correct
  • D
    (a) and (d) are correct
    Correct
6
Which of the following is an application of Earth’s gravitation A It holds atmosphere around our globe B It holds us firmly on the surface of the Earth C It is responsible for motion of moon D It is responsible for sea tides due to the moon
  • A
    All of these
    Correct
  • B
    (a) and (b) are correct
  • C
    (a), (b) and (c) are correct
  • D
    (b) and (c) are correct
7
Suppose a planet starts shrinking the value of ‘g’ starts
  • A
    increasing
    Correct
  • B
    remains the same
  • C
    decreasing
  • D
    becomes zero.
8
Two bodies of mass M and m are kept on the surface of the Earth. What is the ratio of acceleration due to gravity on the two bodies
  • A
    \(\frac{1}{2}\)
  • B
    1:1
    Correct
  • C
    M/m
  • D
    m/M
9
The value of ‘g’ at the mount Everest is
  • A
    g
  • B
    $< g$
    Correct
  • C
    zero
  • D
    >g
10
A ball thrown up vertically returns to the ground after 10 second. Find the velocity with which it was thrown up? (\({\text{g}} = {\text{1}}0{\text{m}}/{{\text{s}}^{\text{2}}}\))
  • A
    50m/s
    Correct
  • B
    100m/s
  • C
    none of these
  • D
    10m/s
11
As we move above the surface of the Earth, the value of g
  • A
    decreases
    Correct
  • B
    increases
  • C
    information not sufficient
  • D
    remains same
12
Drop an iron nail and a sheet of paper from the roof of your house. Which of the two will reach the ground first?
  • A
    paper
  • B
    an iron nail
    Correct
  • C
    both simultaneously
  • D
    Information incomplete
13
Find the in correct statement ?
  • A
    the value of ‘g’ decreases with height
  • B
    the value of ‘g’ increases with depth.
    Correct
  • C
    the value of ‘g’ is more at poles and less at equator.
  • D
    the value of g at the surface of the Earth is \({\text{9}}.{\text{8m}}/{{\text{s}}^{\text{2}}}\)
14
Which of the following statement is incorrect?
  • A
    When a body is dropped freely from a height its initial velocity is zero.
  • B
    When a body is thrown vertically upward its final velocity become zero.
  • C
    None of these
    Correct
  • D
    When a body is throne vertically upward the value of acceleration due to gravity is negative
15
“When an apple is thrown up earth attract the apple but the apple does not attract the earth” The above written statement is
  • A
    true
  • B
    partially true
  • C
    partially false.
  • D
    false
    Correct