Which of the following statement state the importance of the universal law of gravitation?
I. The motion of planets around the Sun
II. The tides due to the moon and the Sun
Show answer & explanation
Correct answer: C
Explanation
Correct Answer:
Both I and II
Explanation:
The Universal Law of Gravitation states that every object in the universe attracts every other object.
• Statement I: The motion of planets around the Earth (or Sun) — this occurs due to gravitational force, which keeps planets in their orbits.
• Statement II: Tides caused by the Moon and the Sun — this is also due to gravitational force, which causes the rise and fall of ocean water.
Therefore, both statements explain the importance of gravity.
Key Points:
• Law: Universal Law of Gravitation
• Effect: Controls planetary motion
• Effect: Causes tides
• Discovered by: Isaac Newton
• Importance: Explains cosmic phenomena
Additional Facts:
• Every object attracts another object.
• The force depends on mass and distance.
• It is a fundamental concept in astronomy.
Important Questions for Exam:
Who gave the law of gravitation?
Answer: Isaac Newton
What causes tides?
Answer: Gravitational pull of the Moon and the Sun
Why do planets stay in orbit?
Answer: Due to gravitational force
On what factors does gravitational force depend?
Answer: Mass and distance