The spring of a rocket in flight burns up due to friction .At whose expense is the heat energy required for burningobtained ? The rocket or the atmosphere ?

The spring of a rocket in flight burns up due to friction .At whose ex

1.	The spring of a rocket in flight burns up due to friction .At whose expense is the heat energy required for burningobtained ? The rocket or the atmosphere ?
Answer» Solution :Heat energy REQUIRED for burning of casting of ROCKET comes FROMTHE rosketitself . Asresult of work done againstfrictionthe kinetic energyof rocketcontinuously decreases and this work against FRICTION REAPPEARS as heat energy .