A rocket has an initial mass of 28500 kg, of which 20% is thepayload (i.e., the mass of the rocket minus the fuel). It burnsfuel at a rate of 195 kg/s and exhausts its gas at a relative speedof 1.5 km/s.
(a) Find the thrust of the rocket.
kN
(b) Find the time until burnout.
s
(c) Find its final speed assuming it moves upward near the surfaceof the earth where the gravitational field g isconstant.
km/s
