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Grade: 10

                        

Can a rocket reach a speed greater than the speed of the exhaust gases that propel it? Explain why or why not.

5 years ago

Answers : (1)

Jitender Pal
askIITians Faculty
365 Points
							No, the rocket can never reach a speed greater than the speed of the exhaust gases that propel it. This can be seen from the fact that the thrust on the rocket is given by 235-1369_1.PNGterm  is negative, the thrust points in the direction of the velocity vector of the rocket. However, if the final speed of the rocket exceeds the velocity of the exhaust gases, the thrust would reverse its direction and would now point in the direction opposite to the direction of velocity vector of rocket. This will decrease its speed and eventually the rocket will end up moving with lower velocity again.
						
5 years ago
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