A rocket of mass m is fired vertically upward and after the fuel burning it weighs m'. Ejection of fuel gas is at a constant rate of m 0 per second with a constant velocity of u rel relative to the rocket. Final speed of rocket after the complete burn out of fuel is given by v =
A
u rel log e 
B
u rel log e 
C
- u rel log e 
D
– u rel 
Text Solution
Verified by ExpertsThe correct answer is:
A
or 
i.e., dv = 
i.e., v = - u rel 
= u rel log e 
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