Nala, Nila and Hanuman try to understand the different types of forces.
Playing with the Centre of Gravity toy that they built makes Hanuman more curious. He directs his questions at Nala’s brother Nila.
Hanuman: Are there any other forces that our body uses to stay stable?
Nila: Oh yes. There are nine forces acting on our body at all times.
Nala: Like the planets that revolve around the sun? There are forces that make them orbit the sun and keep them from floating away.
Nila: Not exactly, but these planets are also affected by various forces. When an object has mass (volume of matter) and when it moves, all these forces comes into play.
Hanuman: Don’t all planets have mass? In fact, everything that is visible to our eye has mass. And everything is in motion.
Nila: Not only the things we can see, but even invisible matter like air have mass.