Physics · LAWS OF MOTION

A spaceship of mass \( 2000 \text{ kg} \) is moving in interstellar space, far away from all gravitational influences, with its rockets turned off at a constant velocity of \( 500 \text{ m s}^{-1} \). What is the magnitude of the net external force acting on the spaceship?

1. A
   \( 10^6 \text{ N} \)
2. B
   \( 2000 \text{ N} \)
3. C
   \( 2.5 \times 10^5 \text{ N} \)
4. D
   \( 0 \text{ N} \)