Scamper “Uncle, my plane doesn’t fly. Tell me, how do you fly your plane?” Rahul asked Pilot Sudarshan, showing his paper plane. “Lot of power is needed to offtake. Real planes have powerful engines.” “Uncle, why do that need this high energy?” “For any object to fly, the two main obstacles are gravity and inertia.” “What does they mean?” “Gravity refers to its weight. An object cannot fly due to its weight.” “And Inertia?” “According to Newton’s principle, an object tries to maintain its state unless an external force acts upon it.” “I have understood it uncle. That is why