Universal Law of Gravitation

Isaac Newton revolutionized our understanding of forces by proposing that the same laws of physics apply universally, not just on Earth. His Universal Law of Gravitation explains that all objects attract each other with a force proportional to their masses and inversely proportional to the square of the distance between them. Earth's gravity is stronger than other celestial bodies due to its mass and proximity. Even in space, gravity is never zero; it just diminishes with distance. Newton's insights laid the foundation for modern physics.

What was Isaac Newton's groundbreaking realization about the forces in the universe?

• Gravity only affects large celestial bodies.

• The sun's gravity is stronger than Earth's.

• Forces on Earth are different from those in space.

• The same forces and laws apply universally.

Why is Earth's gravitational pull stronger than that of the sun or Saturn when you jump?

• Because the sun and Saturn have no gravity.

• Because the sun's gravity only affects planets.

• Because Earth's atmosphere increases gravity.

• Because Earth is closer and has more mass.

What two factors determine the strength of gravitational force between two objects?

• Mass and speed

• Distance and speed

• Mass and distance

• Size and shape

Why don't we fall toward the sun despite its massive size?

• Because the sun's gravity is weaker than Earth's.

• Because the sun is much farther away.

• Because Earth's atmosphere blocks the sun's gravity.

• Because the sun's gravity only affects other stars.

What happens to gravitational force as the distance between two objects increases?

• It becomes stronger.

• It remains the same.

• It decreases.

• It becomes zero.