A particle A A\,A moves with constant acceleration (−2i+4j) ms−2(-2\mathbf{i} + 4\mathbf{j}) \text{ ms}^{-2}(−2i+4j) ms−2. At time t=0t = 0t=0, A A\,A has speed u ms−1u \text{ ms}^{-1}u ms−1. At time t=5 st = 5 \text{ s}t=5 s, A A\,A has velocity (−5i+8j) ms−1(-5\mathbf{i} + 8\mathbf{j}) \text{ ms}^{-1}(−5i+8j) ms−1.
Find the value of uuu.
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.