Question

In a rocket m changes with time. Write down the mathmatical form of
Newton's law in this case and interpret it physically.

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Answer 1

Answer:

This is Newton second law of motion i.e.

force is the rate of change of momentum right

now

force d(mv)/dt

now as a mass is not constant we will do partial differentiation

and get

f=v*dm/dt+m*dv/dt

hope it helps

we know just

f= mdv/dt because mass is constant in most of the cases