A certain crane can provide a maximum lifting force of 25000 N. It hoists a 2000 kg load starting at ground level by applying the maximum force for a 2 second interval; then, it applies just sufficient force to keep the load moving upward at a constant speed. Approximately how long does it take to raise the load from ground level to a height of 30 m?

(a) 2 s

(b) 5 s

(c) 7 s

(e) 10 s

(d) 9 s