Two particles, PPP and QQQ, move in the same horizontal plane.
Particle PPP is initially at rest at the point with position vector (5i+2j)(5\mathbf{i} + 2\mathbf{j})(5i+2j) metres and moves with constant acceleration (2i+3j) m s−2(2\mathbf{i} + 3\mathbf{j})\, \text{m}\,\text{s}^{-2}(2i+3j)ms−2.
Particle QQQ moves in a straight line, passing through the points with position vectors (2i+3j)(2\mathbf{i} + 3\mathbf{j})(2i+3j) metres and (6i+cj)(6\mathbf{i} + c\mathbf{j})(6i+cj) metres.
PPP and QQQ are moving along parallel paths.
Show that c=9c = 9c=9.
Find an expression for the position vector of PPP at time ttt seconds.
Hence, prove that the paths of PPP and QQQ are not collinear.
133 exam-style questions on WJEC A Level Maths 4.11 Vectors (A-level only), covering 4.11.1 Vectors (A-level only) and 4.11.2 Vectors (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.