CBSE (Science) Class 11CBSE
Share
Notifications

View all notifications

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? - CBSE (Science) Class 11 - Physics

Login
Create free account


      Forgot password?

Question

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?

Solution 1

Rocket

The burning of the casing of a rocket in flight (due to friction) results in the reduction of the mass of the rocket.

According to the conservation of energy: Total Energy (T,E) = Potential energy(P.E) + Kinetic Energy (K.E)

`= mgh + 1/2 mv^2`

The reduction in the rocket’s mass causes a drop in the total energy. Therefore, the heat energy required for the burning is obtained from the rocket.

Solution 2

Heat energy required for burning of casing of rocket comes from the rocket itself. As a result of work done against friction the kinetic energy of rocket continuously decreases – and this work against friction reappears as heat energy.

  Is there an error in this question or solution?

APPEARS IN

 NCERT Solution for Physics Textbook for Class 11 (2018 to Current)
Chapter 6: Work, Energy and Power
Q: 5.1 | Page no. 135
Solution 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? Concept: Various Forms of Energy : the Law of Conservation of Energy.
S
View in app×