Class 11th !
Explain Kepler's laws of planetary motion .
{ Plzz Explain in easy language }
Answers
Answer:
Kepler's law of planetary motion is a set of 3 laws which states the motion/movement of planets around sun.
1. The 1st law states that the trajectory of planets around sun is similar to a ellipse such that the sun remains at one of the focal points.
2. The second law is based on conservation of angular momentum.
It states that the area sweeped by the planet in similar times are equal.
This can be proved by the concept of AREAL VELOCITY which remains constant.
3. The square of orbital period of a planet is proportional to the semi major axis of it's orbit.
In simplified words, if you divide the time period of planets by the distance from the sun , you get a constant number for all planets.
Another thing to know : Kepler's 3rd law was the pre requisite for proving Newton's inverse square rule.
Explanation:
Kepler's three laws of planetary motion can be stated as follows:
(1) All planets move about the Sun in elliptical orbits, having the Sun as one of the foci.
(2) A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time.
(3) The squares of the sidereal periods (of revolution) of the planets are directly proportional to the cubes of their mean distances from the Sun.