A particle C C\,C moves with constant acceleration (3i−5j) ms−2(3\mathbf{i} - 5\mathbf{j}) \text{ ms}^{-2}(3i−5j) ms−2. At time t=0t = 0t=0, C C\,C has speed u ms−1u \text{ ms}^{-1}u ms−1. At time t=4 st = 4 \text{ s}t=4 s, C C\,C has velocity (5i+4j) ms−1(5\mathbf{i} + 4\mathbf{j}) \text{ ms}^{-1}(5i+4j) ms−1.
Find the value of uuu.
Practise Edexcel A Level Maths Further Kinematics with exam-style questions for A Level Maths. 54 questions covering Vectors in Kinematics, Vector Methods with Projectiles, Variable Acceleration in One Dimension, Differentiating Vectors, and Integrating Vectors, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.