Why planets move faster when closer to sun? explained in HINDI

In this Science (Physics) video in Hindi for Class 9 we explained why planets move faster when closer to sun. This is a topic from Chapter 10 - 'Gravitation' for class 9th.

Planets move in elliptical path around the sun. As the path is elliptical, there is a point where the planet is farthest from the sun which is called 'aphelion'. And there is a point where the planet is closest to the sun which is called 'perihelion'. According to Kepler's second law of planetary motion the line joining the planet and the Sun sweep equal areas in equal intervals of time. It concludes, when the planet crosses the aphelion, it moves slowest and when crosses the perihelion, it moves fastest.

The reason behind this, is the difference in potential energy, which has been explained in this video.

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🔴 Click here to watch the whole playlist on Chapter 10 : 'Gravitation' for Class 9 :
   • Introduction to Gravitation || in Hin...  

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Other videos from this chapter :-

🔴 Introduction to Gravitation
   • Introduction to Gravitation || in Hin...  

🔴 Universal Law of Gravitation
   • Universal Law of Gravitation || for C...  

🔴 Free Fall || Calculating 'g'
   • Free Fall || Calculate the Value of '...  

🔴 Motion Under Gravity
   • Motion Under Gravity || for Class 9 i...  

🔴 Motion Under Gravity (Part 2)
   • Motion Under Gravity (Part - 2) || Ve...  

🔴 Mass and Weight
   • Mass and Weight || for Class 9 in Hindi  

🔴 Weight of an object on the moon
   • Weight on Moon || for Class 9 in Hindi  

🔴 Kepler's Laws of Planetary Motion
   • Kepler's Laws of Planetary Motion || ...  

🔴 How did Newton guess the Inverse Square Rule
   • How did Newton guess the Inverse Squa...  

🔴 Thrust and Pressure
   • Thrust and Pressure || for Class 9 in...  

🔴 Pressure in Fluids
   • Pressure in Fluids || for Class 9 in ...  

🔴 Pressure in Fluids (Part 2) - Pascal's law, Torricelli's law
   • Pressure in Fluids (Part 2) || Pascal...  

🔴 Buoyancy
   • Buoyancy || for Class 9 in Hindi  

🔴 Archimedes' Principle
   • Archimedes' Principle || for Class 9 ...  

🔴 Why objects float or sink when placed on the surface of water
   • Why objects float or sink when placed...  

🔴 Relative Density
   • Relative Density || for Class 9 in Hindi