MCQ Universal Law of Gravitation Chapter 10 Class 9 Science

MCQ’s For All Chapters – Science Class 9th

1. There will be total 24 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.

Your comments:

Question 1 of 24

2. The value of 'g' is minimum:

on hills

in mines

at equator of earth

at poles of earth

Your comments:

Question 2 of 24

3. Weight of an object is highest at

Center of earth

Poles

Above the earth's surface

Equator

Your comments:

Question 3 of 24

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.

Your comments:

Question 4 of 24

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

Your comments:

Question 5 of 24

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'

Your comments:

Question 6 of 24

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

98 N

48 N

9.8 N

8 N

Your comments:

Question 7 of 24

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

Your comments:

Question 8 of 24

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

120 kg

60 kg

10 kg

zero

Your comments:

Question 9 of 24

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

Your comments:

Question 10 of 24

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

r2

1/r²

r

1/r

Your comments:

Question 11 of 24

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

98 N

90 N

9.8 N

100 N

Your comments:

Question 12 of 24

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

Your comments:

Question 13 of 24

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

Thunder lightning

Motion of planets around the earth

Occurrence of tides

Rainfall and Snowfall

Your comments:

Question 14 of 24

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

Your comments:

Question 15 of 24

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

A

B

C

D

Your comments:

Question 16 of 24

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

Your comments:

Question 17 of 24

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.

Your comments:

Question 18 of 24

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

F

2F

3F

4F

Your comments:

Question 19 of 24

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

A

B

C

D

Your comments:

Question 20 of 24

21. Assertion-An object when thrown upward reaches a certain height and falls downward.

Reason- Object has their own energy to come down side.

a) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c) Assertion is true but Reason is false.

d) Both Assertion and Reason are false.

Question 21 of 24

22. Assertion : Universal gravitational constant G is a scalar quantity.
Reason : The value of G is the same throughout the universe.

a.) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b.) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c.) Assertion is true but Reason is false.

d.) Assertion is false but Reason is true.

Question 22 of 24

23. Assertion : When distance between two bodies is doubled and also mass of each body is doubled, then the gravitational force between them remains the same.
Reason : According to Newton’s law of gravitation, product of force is directly proportional to the product mass of bodies and inversely proportional to square of the distance between them.

a.) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b.) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c.) Assertion is true but Reason is false.

d.) Assertion is false but Reason is true.

Question 23 of 24

24. Assertion-An object when thrown upward reaches a certain height and falls downward.
Reason-Due to gravitational energy the object falls down on the earth.

a.) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b.) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c.) Assertion is true but Reason is false.

d.) Assertion is false but Reason is true.

Question 24 of 24

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