A remote-controlled boat B B\,B moves across a lake with constant acceleration. At time t=0t = 0t=0, B B\,B is moving in the direction (3i−4j)(3\mathbf{i} - 4\mathbf{j})(3i−4j) with speed 10 ms-1. After 5 seconds, its velocity is (11i−13j) ms−1(11\mathbf{i} - 13\mathbf{j}) \text{ ms}^{-1}(11i−13j) ms−1.
Find the acceleration of BBB.
