Universal Law of Gravitation, Class 9 Science

1. There will be total 20 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. Gravitational force does not depend on:

Masses of two bodies.

The gravitational constant.

Charge on two bodies

Separation between two bodies.

Question 1 of 20

2. The value of ‘g’ is minimum:

on hills

in mines

at equator of earth

at poles of earth

Question 2 of 20

3. Weight of an object is highest at

Center of earth

Poles

Above the earth’s surface

Equator

Question 3 of 20

4. Apple falls towards the earth but the earth does not move towards the apple because

only earth exerts force on apple, apple does not exert force on earth

apple experiences greater force than the earth

only apple exerts force on earth, earth does not exert force on apple

acceleration is inversely proportional to mass, so acceleration of earth is negligible.

Question 4 of 20

5. What is the mass of a body whose weight is 59 N? Take g = 9.8 m/s²

5 kg

9 kg

6 kg

50 kg

Question 5 of 20

6. A ball is thrown vertically upwards with a velocity ‘u’. The velocity with which it falls to the earth again is:

Greater than ‘u’

Greater than or equal to ‘u’

Equal to ‘u’

Less than ‘u’

Question 6 of 20

7. Weight of a body on earth is 48 N; its weight on moon is

98 N

48 N

9.8 N

8 N

Question 7 of 20

8. Universal law of gravitation does not explain

the tides on earth due to the moon

the motion of electrons in an atom

the motion of planets around the Sun

the motion of the moon around the earth

Question 8 of 20

9. The mass of a body on earth is 60 kg, its mass on moon is

120 kg

60 kg

10 kg

zero

Question 9 of 20

10. If you drop a stone and a piece of paper to the earth, they don’t take the same time to reach the earth because:

air resistance slows down the paper more.

mass of stone is more than mass of paper

acceleration due to gravity is more for the stone

universal gravitational constant G is different for both

Question 10 of 20

11. The force of gravitation between two bodies varies with r as:

1/r²

1/r

Question 11 of 20

12. The magnitude of gravitational force between the earth and 10 kg body is:

98 N

90 N

9.8 N

100 N

Question 12 of 20

13. If the mass of earth is increased by 25% without any change in its size. Then, its acceleration due to gravity:

may decrease by 25 % or remain constant

increases by 25%

decreases by 25%

remains constant

Question 13 of 20

14. Which of following is not related to gravitational law?

Thunder lightning

Motion of planets around the earth

Occurrence of tides

Rainfall and Snowfall

Question 14 of 20

15. How much gravitational force acts between two people of mass 60 kg each sitting at distance of 1 m apart?

2.4 × 10^-8 N

2.4 × 10^-7 N

2.4 × 10^-9 N

2.4 × 10^-6 N

Question 15 of 20

16. Purchasing 1 kilogram of sugar will be profitable at:

Question 16 of 20

17. Two massive objects of masses 5 kg and 20 kg are separated by a distance of 25 m, then the distance at which no net gravitational force is felt due to these masses, is

5 m from 5 kg object

50 m from 20 kg object

25 m from 20 kg object

8.33 m from 5 kg object

Question 17 of 20

18. Ocean tides are the result of:

Gravitational force between sun and earth.

Gravitational force between earth and moon.

Gravitational force between sun and moon.

Gravitational force between earth and venus.

Question 18 of 20

19. If the mass of one body is doubled, then the gravitational force F between two bodies become

Question 19 of 20

20. The mass of earth in terms of ‘g’ acceleration due to gravity and ‘G’ universal gravitational constant is:

Question 20 of 20