Newton’s Law of Universal Gravitation states that every particle in the universe exerts an attractive force on every other particle. This force is proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
NCERT Class 11 Physics
Gravitation
CBSE EXAM 2024-25
Numerous observations validate the law of gravitation. Key examples include:
1. Planetary and Lunar Motion:
The Earth’s orbit around the Sun and the Moon’s revolution around the Earth are well-explained by this law.
2. Tides:
Gravitational attraction between the Moon and seawater causes ocean tides.
3. Eclipses:
Predictions of solar and lunar eclipse timings using this law are highly accurate.
4. Artificial Satellites:
The law enables precise calculation of satellite orbits and periods of revolution.
5. Variation in g:
Changes in the value of g across Earth’s surface align with gravitational principles.