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Here, mass m and velocity v both are variable. Can anyone explain how this term given below comes:

Here, mass m and velocity v both are variable. Can anyone explain how this term given below comes:
 

Question Image
Grade:11

2 Answers

sumanth theeda
22 Points
7 years ago
see vishesh in case of variable mass systems like rockets, jet plane etc fuel is also carried. hence fuel also constituents for its weight.. to do any problem in these cases momentum/ energy conservation is used. hence mass and velocity both can be variable!..
VISHESH DHARAIYA
17 Points
7 years ago
Dear Sumanth, Please see the attachment. Can you explain how the second term is derived in the equaiton?

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