At 10 a.m. plane A A\,A has position vector (4i+2j)(4\mathbf{i} + 2\mathbf{j})(4i+2j) km and moves with constant velocity (−4i+6j)(-4\mathbf{i} + 6\mathbf{j})(−4i+6j) km h−1\text{h}^{-1}h−1. Another plane B B\,B has position vector (i−4j)(\mathbf{i} - 4\mathbf{j})(i−4j) km and moves with constant velocity (−2i+9j)(-2\mathbf{i} + 9\mathbf{j})(−2i+9j) km h−1\text{h}^{-1}h−1.
Find the relative displacement of plane A A\,A from plane B B\,B after t t\,t hours.
Find the time when A A\,A is due west of BBB
Find the time, after 10 a.m. when the planes are exactly 15 km apart.
363 exam-style questions on Edexcel A Level Maths Further Kinematics, covering 8.1 Vectors in Kinematics, 8.2 Vector Methods with Projectiles, 8.3 Variable Acceleration in One Dimension, 8.4 Differentiating Vectors, and 8.5 Integrating Vectors. Each one has a worked solution and a mark scheme showing where the marks go.