A particle S S\,S moves with constant acceleration (5i+2j)(5\mathbf{i} + 2\mathbf{j})(5i+2j) ms−2^{-2}−2. At time t=0t = 0t=0, S S\,S has speed u u\,u ms−1^{-1}−1 and initial velocity vector u\mathbf{u}u. At time t=3t = 3t=3, S S\,S has velocity (−4i−7j)(-4\mathbf{i} - 7\mathbf{j})(−4i−7j) ms−1^{-1}−1.
Find the value of uuu.
30 exam-style questions on Edexcel AS Level Maths Forces and Motion, covering 10.1 Force Diagrams, 10.2 Forces as Vectors, 10.3 Forces and Acceleration, 10.4 Motion in 2 Dimensions, 10.5 Connected Particles, and 10.6 Pulleys. Each one has a worked solution and a mark scheme showing where the marks go.