Here we see top views of three motorboats crossing a river. All have the same speed relative to the water, and all experience the same river flow. Construct resultant vectors showing the speed and direction of the boats. Rank them from most to least for a. the time for the boats to reach the opposite shore. b. the fastest ride.
Solution 4R We can draw the resultant vectors as shown in the figure below. RA , RB and RC are the resultants in the three different cases. According to the triangular law of vector addition, the boat in the case C will have the highest speed, since the angle between the two velocity vectors is acute. So, it will be the fastest followed by B and C. The ranking is v C > v B > v A Answer of p art b. Ranking of time t B > tA > t C Answer of part b.