A 70 kg astronaut floating in space in a 110 kg MMU (manned maneuvering unit) experiences an acceleration of 0.029 m/s2 when he fires one of the MMU's thrusters.
(a) If the speed of the escaping gas relative to the astronaut is 490 m/s, how much gas is used by the thruster in 5.0 s?
(b) What is the thrust of the thruster?