A rocket of mass 500 kg can be accelerated from rest at 1800 km/h in 2 seconds. What is the magnitude of the required net force?
a) (5 × 10⁴ N)
b) (9 × 10⁴ N)
c) (1.8 × 10⁴ N)
d) (2.5 × 10⁴ N)