Suppose the first stage of a two-stage rocket has a total massof 12,000 kg, of which 9,000 kg is fuel.
the total mass of the second stage is 1,000 kg, of which 700kg is fuel.
assume that the relative speed vexof ejected material is constant, and ignore the effect ofgravity.
a) suppose the entire fuel supply carried by the two-stagerocket is utilized in a single-stage rocket with the same totalmass of 13,000 kg. in terms of vex , what isthe speed of the rocket, starting from rest, when its fuel isexhausted?
b) for the two-stage rocket, what is the speed when the fuelof the first stage is exhausted if the first stage carries thesecond stage with it to this point?
this speed (from part b) then becomes the initial speed of thesecond stage. at this point, the second stage separates from thefirst stage.
c) what is the final speed of the second stage?
d) what value of vex is required to givethe second stage of the rocket a speed of 7.00 km/s?