A hockey puck Q Q\,Q slides across smooth ice with constant acceleration. At time t=0t = 0t=0, Q Q\,Q is moving in the direction (−8i+6j)(-8\mathbf{i} + 6\mathbf{j})(−8i+6j) with speed 20 ms-1. After 8 seconds, its velocity is (4i+18j) ms−1(4\mathbf{i} + 18\mathbf{j}) \text{ ms}^{-1}(4i+18j) ms−1.
Find the acceleration of QQQ.
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.