After t t\,t seconds, a particle has position vector r=[(6t2−5)i+(4t2+9t)j] m\mathbf{r} = [(6t^2 - 5)\mathbf{i} + (4t^2 + 9t)\mathbf{j}] \text{ m}r=[(6t2−5)i+(4t2+9t)j] m
Find the magnitude of the acceleration of the particle.
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.