Keppler's Laws

Question 1

State Keppler’s First Law

Answer 1

This states that the planets orbit the sun in an elliptical path with the sun as a foci.

Question 2

State Keppler’s second law.

Answer 2

The radius vector from the sun to a planet sweeps over an equal area in equal time.

Question 3

State Keppler’s third law.

Answer 3

This states that the square of the period of revolution of a planet is proportional to the cube of its mean distance to the sun.

T² ∝ r³

Question 4

What is the mathematical expression for the period of revolution of a body?

Answer 4

T² = (4π/GM) • r³

Where r³ is the radius of the body
M = mass of the same body
G = gravitational constant