A Certain Crane Can Provide a Maximum Lifting Force of 25

Multiple Choice

A certain crane can provide a maximum lifting force of 25 000 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 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
D) 9 s
E) 10 s