A Rocket Moving in Outer Space Maintains a Constant Acceleration

Multiple Choice

A rocket moving in outer space maintains a constant acceleration (magnitude = 20 m/s2) while ejecting fuel at a speed of 15 km/s relative to the rocket. If the initial mass of the rocket is 3000 kg, what is the magnitude of the thrust after 800 kg of fuel have been consumed?

A) 56 kN
B) 48 kN
C) 52 kN
D) 44 kN
E) 36 kN