Which of the following phenomena are successfully explained by the Universal Law of Gravitation? 1. The motion of the moon around the earth. 2. The formation of tides due to the moon and the Sun. 3. The force that binds the atmosphere to the earth. 4. The motion of planets around the Sun. Select the correct answer using the code given below:

The correct option is (d). Explanation Newton's Universal Law of Gravitation states that every particle in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This fundamental force governs the motion of celestial bodies and various terrestrial phenomena. Statement-wise Analysis - Statement 1 is Correct: The motion of the Moon around the Earth is governed by the gravitational force exerted by the Earth. This gravitational pull provides the necessary centripetal force required to keep the Moon in its orbit. - Statement 2 is Correct: The formation of high and low tides in the oceans is primarily caused by the gravitational attraction exerted by the Moon and the Sun on the Earth's water bodies. - Statement 3 is Correct: The atmosphere is a layer of gases surrounding the Earth. It is bound to the planet by the Earth's gravitational force, which prevents gas molecules from escaping into space. - Statement 4 is Correct: The motion of planets around the Sun is analogous to the motion of the Moon around the Earth. The Sun's gravitational force provides the centripetal force necessary to keep the planets in their respective elliptical orbits. Key Takeaway: The Universal Law of Gravitation is a unifying principle that explains diverse phenomena, including the orbital mechanics of moons and planets, the formation of tides, and the binding of the atmosphere to planetary bodies.

NCERT Class 9 Science — Chapter 3: Gravitation

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Which of the following phenomena are successfully explained by the Universal Law of Gravitation?

The motion of the moon around the earth.
The formation of tides due to the moon and the Sun.
The force that binds the atmosphere to the earth.
The motion of planets around the Sun.

Select the correct answer using the code given below:

Official previous-year question

Verified 1 Aug 2026.

Options

A1 and 2 only
B2 and 3 only
C3 and 4 only
D1, 2, 3 and 4

Did you get this right?

Solution

The correct option is (d).

Explanation

Newton's Universal Law of Gravitation states that every particle in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This fundamental force governs the motion of celestial bodies and various terrestrial phenomena.

Statement-wise Analysis

Statement 1 is Correct: The motion of the Moon around the Earth is governed by the gravitational force exerted by the Earth. This gravitational pull provides the necessary centripetal force required to keep the Moon in its orbit.
Statement 2 is Correct: The formation of high and low tides in the oceans is primarily caused by the gravitational attraction exerted by the Moon and the Sun on the Earth's water bodies.
Statement 3 is Correct: The atmosphere is a layer of gases surrounding the Earth. It is bound to the planet by the Earth's gravitational force, which prevents gas molecules from escaping into space.
Statement 4 is Correct: The motion of planets around the Sun is analogous to the motion of the Moon around the Earth. The Sun's gravitational force provides the centripetal force necessary to keep the planets in their respective elliptical orbits.

Key Takeaway: The Universal Law of Gravitation is a unifying principle that explains diverse phenomena, including the orbital mechanics of moons and planets, the formation of tides, and the binding of the atmosphere to planetary bodies.

Your note

More from Chapter 3: Gravitation

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Which of the following instruments are based on Archimedes’ Principle? 1. Lactometers 2. Hydrometers 3. Odometers 4. Barometers Select the correct answer using the code given below:

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Consider the following statements about the density of a substance: 1. It is defined as mass per unit volume. 2. If the density of an object is less than that of a liquid, it will sink in that liquid. 3. The density of a substance is a characteristic property. Which of the statements given above is/are correct?

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The correct option is (d).

Explanation

Statement-wise Analysis

Statement 1 is Correct: The motion of the Moon around the Earth is governed by the gravitational force exerted by the Earth. This gravitational pull provides the necessary centripetal force required to keep the Moon in its orbit.
Statement 2 is Correct: The formation of high and low tides in the oceans is primarily caused by the gravitational attraction exerted by the Moon and the Sun on the Earth's water bodies.
Statement 3 is Correct: The atmosphere is a layer of gases surrounding the Earth. It is bound to the planet by the Earth's gravitational force, which prevents gas molecules from escaping into space.
Statement 4 is Correct: The motion of planets around the Sun is analogous to the motion of the Moon around the Earth. The Sun's gravitational force provides the centripetal force necessary to keep the planets in their respective elliptical orbits.