Kepler's Second Law of Planetary Motion

The video tutorial covers Kepler's Second Law of Planetary Motion, explaining how a planet's speed varies in its elliptical orbit around the sun. It highlights that the area swept by a line between the sun and the planet is constant over equal time periods. The tutorial also discusses the concept of angular momentum, noting that it remains constant for a satellite in an elliptical orbit. The video addresses common misconceptions about planetary orbits and clarifies the animation used to illustrate these concepts.

What does Kepler's Second Law of Planetary Motion state?

• The speed of a planet is constant throughout its orbit.

• An imaginary line between the sun and a planet sweeps out equal areas in equal time periods.

• Planets move in perfect circles around the sun.

• The sun is the largest planet in the solar system.

How does the speed of a planet change as it moves closer to the sun?

• It remains constant.

• It stops moving.

• It decreases.

• It increases.

What is another term used for the sun in the context of planetary motion?

• The outer body

• The central body

• The minor body

• The secondary body

What is true about the acceleration of a satellite in an elliptical orbit?

• It is not constant.

• It is uniformly accelerated.

• It is always zero.

• It is constant.

What remains constant for a satellite in an elliptical orbit?

• Its speed

• Its distance from the sun

• Its mass

• Its angular momentum