A rocket is moving in outer space where no external forces exist.Suppose its mass is mR and its velocity is vR at a particular time.When a mass mF of fuel is ejected,the mass of the rocket becomes (mR - mF) and its velocity increases to (vR+ vR) .Suppose the fuel is always ejected at a constant speed vF with respect to the rocket.Derive an expression for vR as a function of mR given the rocket's initial mass and speed are m0 and v0,respectively.
A) vR = v0 + vF ln(mR/m0)
B) vR = v0 - vF ln(mR/m0)
C) vR = v0 - vF exp(m0/mR)
D) vR = v0 - vF ln(m0/mR )
E) vR = v0 + vF exp(mR/m0)
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