Question 18 of 25 4 Points A boat of mass 450 kg drifts along a river at a speed of 10 m/s to the north. What impulse is required to decrease the speed of the boat to 6 m/s to the north? O A. 2700 kg•m/s north O B. 2700 kg-m/s south O C. 1800 kgm/s south O D. 1800 kg-m/s north SUBMIT