0 of 6 questions completed

Questions:

- 1
- 2
- 3
- 4
- 5
- 6

#### Information

**Quiz Description** :

**Name: **Newton’s Law of Gravitational Force Objective Question answer test

**Subject: **Physics

**Topic: **Newton’s Law of Gravitational Force

**Questions: **6 Objective Type

**Time Allowed: **10 Minutes

**Important for: **IIT JEE, UPSEE, WBJEE Engineering Entrance exams, AIPMT and other PMT entrance test, +2 school students and B. Sc. / M. Sc. College Students.

You have already completed the Test before. Hence you can not start it again.

Test is loading...

You must sign in or sign up to start the Test.

You have to finish following quiz, to start this Test:

#### Congratulations!!!" Newton’s Law of Gravitational Force Objective Question answer test "

0 of 6 questions answered correctly

Your time:

Time has elapsed

Your Final Score is : 0

You have attempted : 0

Number of Correct Questions : 0 and scored 0

Number of Incorrect Questions : 0 and Negative marks 0

Average score | |

Your score |

- Not categorized

You have attempted: 0

Number of Correct Questions: 0 and scored 0

Number of Incorrect Questions: 0 and Negative marks 0

It’s time to share this quiz with your friends on

**Facebook**,**Twitter**,**Google Plus**,**Whatsapp**or**LinkedIn**…Click on

**View Questions**Button to check Correct and incorrect answers.

- 1
- 2
- 3
- 4
- 5
- 6

- Answered
- Review

- Question 1 of 6
##### 1. Question

1 pointsNewton’s law of gravitation is universal, because

CorrectWe know that Newton’s law of gravitation is universal, because it is always attractive and is not affected by any intervening medium.

It also acts on all masses at any distance.IncorrectWe know that Newton’s law of gravitation is universal, because it is always attractive and is not affected by any intervening medium.

It also acts on all masses at any distance. - Question 2 of 6
##### 2. Question

1 pointsThe force of gravitation is

CorrectWe know that the earth behaves as a huge magnet and has a tendency to attract all the objects due to gravitational force.

Therefore gravitational force is a conservative force.IncorrectWe know that the earth behaves as a huge magnet and has a tendency to attract all the objects due to gravitational force.

Therefore gravitational force is a conservative force. - Question 3 of 6
##### 3. Question

1 pointsThe mass of moon is about 1.3% of mass of the earth. Compared to the gravitational force the earth exerts on the moon, the gravitational forces the moon exerts on the earth

CorrectWe know that the Newton’s law of gravitation supports Newton’s third law of motion, i.e., to every action, there is always an equal and opposite reaction.

Therefore gravitational force which the earth exerts on the moon is the same as the gravitational force exerted by the moon on the earth. But it is opposite in direction.IncorrectWe know that the Newton’s law of gravitation supports Newton’s third law of motion, i.e., to every action, there is always an equal and opposite reaction.

Therefore gravitational force which the earth exerts on the moon is the same as the gravitational force exerted by the moon on the earth. But it is opposite in direction. - Question 4 of 6
##### 4. Question

1 pointsIn a gravitational field, work done in transporting a mass from one point to another depends only upon

CorrectWe know that gravitational field is a conservative field, in which work done in transporting a mass from one point to another depends only upon the initial and final positions of the mass i.e., end positions and not on the path traversed.

IncorrectWe know that gravitational field is a conservative field, in which work done in transporting a mass from one point to another depends only upon the initial and final positions of the mass i.e., end positions and not on the path traversed.

- Question 5 of 6
##### 5. Question

1 pointsTwo spheres of masses m and M are situated in air and the gravitational force between them is F. The space around the masses is now filled with a liquid of specific gravity 3. The gravitational force will now be

CorrectWe have Mass of first sphere (m

_{1}) = m; Mass of second sphere (m_{2}) = M; Initial gravitational force = F and specific gravity of liquid = 3.

We know from the Newton’s law of gravitation that the force of attraction between the two spheres = Gm_{1}m_{2}/ r^{2}.

Since the force of attraction between two bodies is independent of the nature of the intervening medium, therefore it will not change or in other words, it will be F.IncorrectWe have Mass of first sphere (m

_{1}) = m; Mass of second sphere (m_{2}) = M; Initial gravitational force = F and specific gravity of liquid = 3.

We know from the Newton’s law of gravitation that the force of attraction between the two spheres = Gm_{1}m_{2}/ r^{2}.

Since the force of attraction between two bodies is independent of the nature of the intervening medium, therefore it will not change or in other words, it will be F. - Question 6 of 6
##### 6. Question

1 pointsIf the distance between the sun and the earth is increased by three times, then force of attraction between them will

CorrectWe have that final distance between sun and the earth (r

_{2}) = 3r_{1}… (where r_{1}is initial distance between the sun and earth).

We know from the Newton’s law of gravitation that the force of attraction between sun and earth (F) = Gm_{s}m_{e}/r^{2}∝ 1/r^{2}

Therefore F_{1}/F_{2}= (r_{2}/ r_{1})^{2}= (3 r_{1}/ r_{1})^{2}= 9 or F_{2}= F_{1}/9.

Thus decrease in force of attraction = F_{1}– F_{2}= F_{1}– F_{1}/9 = (8/9)F_{1}= 89%IncorrectWe have that final distance between sun and the earth (r

_{2}) = 3r_{1}… (where r_{1}is initial distance between the sun and earth).

We know from the Newton’s law of gravitation that the force of attraction between sun and earth (F) = Gm_{s}m_{e}/r^{2}∝ 1/r^{2}

Therefore F_{1}/F_{2}= (r_{2}/ r_{1})^{2}= (3 r_{1}/ r_{1})^{2}= 9 or F_{2}= F_{1}/9.

Thus decrease in force of attraction = F_{1}– F_{2}= F_{1}– F_{1}/9 = (8/9)F_{1}= 89%