The casting of a rocket in flight burns up due to friction. At whose expense the heat energy required for burning obtained ? The rocket or the atmosphere ,or both /

The casting of a rocket in flight burns up due to friction. At whose e

1.	The casting of a rocket in flight burns up due to friction. At whose expense the heat energy required for burning obtained ? The rocket or the atmosphere ,or both /
Answer» SOLUTION :The only sourceof ENERGY is the kinetic energy of the ROCKET.The atmosphere does not contribute any energy . Its role is only to provide friction to convert the kinetic energyof the rocket into heat energy .