The motor of a rocket produces a fairly constant force on the ship by ejecting hot gases through a nozzle at the rear of the ship. Typical data are: weight of ship=32,000 lb, force from rocket engine=60,000lb for acting 50 sec, rate of gas ejection= 12 slugs/sec. At what speed (relative to the ship) must the gas leave the rocket to produce 60,000lb of thrust? If the rocket did not become lighter as it went up, how high would it go if traveling straight up from earth? A mass of 1 slug weighs 32 lb (since g = 32 ft/s^2.). The magnitude of thrust = Vex*dm/dt.