Gravitation Test

Gravitation

This is Gravitation Test-03 for CBSE class 09 Science.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
A body is thrown upwards. What is the direction of ‘g’ when the body is falling down
  • A
    can’t be said
  • B
    upwards
  • C
    downwards
    Correct
  • D
    both a and b
2
A man throws a ball with a velocity of 20m/s. After what time will the ball come back to his hands? (Take g =\({\text{1}}0{\text{m/}}{{\text{s}}^{\text{2}}}\))
  • A
    3 s
  • B
    4 s
    Correct
  • C
    8 s
  • D
    2 s
3
“The equation of motion for free fall can be used in case of any free fall” is
  • A
    partially false.
  • B
    partially true
  • C
    false
    Correct
  • D
    true
4
What is the weight of body whose mass is 100 kg. on the surface of the earth
  • A
    500N
  • B
    980N
    Correct
  • C
    490N
  • D
    100N
5
The weight of an object is least at some region of the earth. What will be the colour of bears found in that region.
  • A
    black
  • B
    blue
  • C
    brown
  • D
    white
    Correct
6
An object weighs 10N when measured on the surface of the Earth. What would be its weight when measured on the surface of the moon?
  • A
    1.5N
  • B
    1.67N
    Correct
  • C
    1.8N
  • D
    1.60N
7
The weight of a body can be expressed in
  • A
    kg
  • B
    N-S
  • C
    N
    Correct
  • D
    J
8
1 kg wt = ?
  • A
    none of these
  • B
    5N
  • C
    19.6N
  • D
    9.8N
    Correct
9
Statement A: When an object is thrown up then its speed at any position while going up is same as the speed while coming down. Statement B: A can’t have zero weight Which of the two statements is true?
  • A
    statement A
  • B
    neither a or b.
  • C
    both a and b
    Correct
  • D
    statement B
10
Calculate the mass of the Earth. given radius of the Earth is\(6.4 \times {10^6}m\).
  • A
    \({\text{6}} \times {\text{1}}{0^{{\text{24}}}}\)kg
    Correct
  • B
    \({\text{7}}.{\text{5}} \times {\text{1}}{0^{{\text{24}}}}{\text{kg }}\)
  • C
    \({\text{6}}.{\text{9}} \times {\text{1}}{0^{{\text{23}}}}{\text{kg }}\)
  • D
    none of these
11
If the weight of Harsh is 150N. What is his mass? (\({\text{g }} = {\text{1}}0{\text{m/}}{{\text{s}}^{\text{2}}}\))
  • A
    12kg.
  • B
    15kg
    Correct
  • C
    90kg
  • D
    100kg
12
Statement A: A person will weigh more in Ooty than in Delhi, Statement B: mass is measured by pan balance and weight is measured by spring balance. Which of the two statements is true?
  • A
    statement A
  • B
    neither a nor b
  • C
    statement B
    Correct
  • D
    both a and b
13
Statement A: Mass of a body is a fundamental property Statement B: Weight is a fundamental property. Which of the two statements is true?
  • A
    statement B
  • B
    both a and b
  • C
    statement A
    Correct
  • D
    neither a or b.
14
A body has a weight W on the surface of Earth. What is its weight on a planet which has mass 10 times that of the Earth and a radius of 4 times that of the earth?
  • A
    \(\frac{2}{5}W\)
  • B
    \(\frac{2}{6}W\)
  • C
    \(\frac{8}{5}W\)
    Correct
  • D
    \(\frac{5}{8}W\)
15
If a block of mass weighed 1N at equator, What would be its weight at poles?
  • A
    1N
  • B
    o
  • C
    more than 1N
    Correct
  • D
    less than 1N