A high-precision surgical micro-robot of mass mmm grams is being navigated through a fluid medium under the influence of two primary forces, P\mathbf{P}P and Q\mathbf{Q}Q.
The forces are defined as follows:
P=(0.7i−3.2j) N \mathbf{P} = (0.7\mathbf{i} - 3.2\mathbf{j}) \text{ N} P=(0.7i−3.2j) N Q=(ki+0.5kj) N \mathbf{Q} = (k\mathbf{i} + 0.5k\mathbf{j}) \text{ N} Q=(ki+0.5kj) Nwhere kkk is a constant scalar.
The resulting acceleration of the micro-robot is measured to be (2.4i+0.8j) m s−2(2.4\mathbf{i} + 0.8\mathbf{j}) \text{ m s}^{-2}(2.4i+0.8j) m s−2.
Determine the value of kkk.
136 exam-style questions on CCEA A Level Maths 2.3 Forces and Newton's laws, covering 2.3.1 Forces and Newton's laws, 2.3.2 Forces and Newton's laws, 2.3.3 Forces and Newton's laws, 2.3.4 Forces and Newton's laws, 2.3.5 Forces and Newton's laws, 2.3.6 Forces and Newton's laws, 2.3.7 Forces and Newton's laws, 2.3.8 Forces and Newton's laws, 2.3.9 Forces and Newton's laws, 2.3.10 Forces and Newton's laws, 2.3.11 Forces and Newton's laws, 2.3.12 Forces and Newton's laws, and 2.3 Forces and Newton's laws. Each one has a worked solution and a mark scheme showing where the marks go.