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  • Answer the following : The casing of a rocket in flight burns up due to friction. At whose expense is the heat energy required for burning obtained? The rocket or the atmosphere?

Q5 (a) Answer the following :
(a) The casing of a rocket in flight burns up due to friction. At whose expense is the heat energy required for burning
      obtained? The rocket or the atmosphere?

 

Answers (1)

best_answer

The total energy is given by :

                                        E\ =\ K.E\ +\ P.E

or                                           =\ \frac{1}{2}mv^2\ +\ mgh

The burning of casing results in a reduction in the mass of the rocket. This leads to a lowering in the total energy.

Thus heat required for burning is obtained from the expenses of the rocket.

Posted by

Devendra Khairwa

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