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If the moon attracts the earth, why does the earth not move to

Science

Class 9

NCERT

Chapter 1: Matter in Our Surroundings

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Chapter 2: Is Matter Around Us Pure?

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Chapter 3: Atoms and Molecules

16 questions

Chapter 4: Structure of the Atom

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Chapter 5: The Fundamental Unit of Life

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Chapter 6: Tissues

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Chapter 7: Diversity in Living Organisms

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Chapter 8: Motion

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Chapter 9: Force and Laws of Motion

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Chapter 10: Work and Energy

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Chapter 11: Sound

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Chapter 12: Why do We Fall Ill?

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Chapter 13: Natural Resourses

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Chapter 14: Improvement in Food Resources

Chapter 15: Gravitation

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The earth and the moon are attracted to each other by gravitational force. Does the earth attract the moon with a force that is greater or smaller or the same as the force with which the moon attracts the earth? Why?

If the moon attracts the earth, why does the earth not move towards the moon?

What happens to the gravitational force between two objects, if:

(i)

The mass of one object is doubled?

(ii)

The distance between the objects is doubled and tripled?

(iii)

The masses of both objects are doubled?
Give reasons in each case.

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Question

Hard

Solving time: 2 mins

If the moon attracts the earth, why does the earth not move towards the moon?

Views: 6,195 students

Updated on: Sep 11, 2023

Book:

Science (NCERT)

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If the moon attracts the earth, why does the earth not move towards the moon?

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Text solutionVerified

Earth and moon is an example of a two-body system. They both rotate in an orbit such that the centripetal force required for circular motion is provided by the gravitational force.

Assume centripetal acceleration of earth to be

a_{e}

M_{e} a_{e} = \frac{G M _{e} M _{m}}{R ^{2}}

a_{e} = \frac{G M _{m}}{R ^{2}}

This is a very small value, and hence the centripetal acceleration is very small. Also, the mass of the earth is very large and hence the center of mass of earth and moon system is very close to the earth. So, the radius of rotation of the earth is very small and negligible.

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Practice more questions from Science (NCERT)

If the moon attracts the earth, why does the earth not move towards the moon?

What happens to the gravitational force between two objects, if:

(i)

The mass of one object is doubled?

(ii)

The distance between the objects is doubled and tripled?

(iii)

The masses of both objects are doubled?
Give reasons in each case.

View all

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Question Text	If the moon attracts the earth, why does the earth not move towards the moon?
Updated On	Sep 11, 2023
Topic	Gravitation
Subject	Science
Class	Class 9
Answer Type	Text solution:1 Video solution: 18
Upvotes	1723
Avg. Video Duration	5 min

If the moon attracts the earth, why does the earth not move towards the moon?

Text solutionVerified

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