An interstellar ship has a mass of 1.20 x 10⁶ kg and is initially at rest relative to a star system.

(a) What constant acceleration is needed to bring the ship up to a speed of 0.10c (where c is the speed of light, 3.0 x 10⁸ m/s) relative to the star system in 3.0 days?

(b) What is that acceleration in g units?

(c) What force is required for the acceleration?

(d) If the engines are shut down when 0.10c is reached (the speed then remains constant), how long does the ship take (start to finish) to journey 5.0 light-months, the distance that light travels in 5.0 months?