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.
265 exam-style questions on AQA A Level Maths 3.2 Q: Kinematics, covering 3.2.1 Language of kinematics, 3.2.2 Graphs in kinematics, 3.2.3 Constant acceleration formulae, 3.2.4 Calculus in kinematics (A-level only), and 3.2.5 Motion under gravity and projectiles (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.