Moderate -0.8 This is a straightforward application of equilibrium conditions where forces sum to zero. Students simply need to add the two given force vectors and negate the result to find F. It requires only basic vector addition and understanding that equilibrium means ΣF = 0, making it easier than average with no problem-solving insight needed.
9 Three forces \(\binom { 7 } { - 6 } \mathrm {~N} , \binom { 2 } { 5 } \mathrm {~N}\) and \(\mathbf { F N }\) act on a particle.
Given that the particle is in equilibrium under the action of these three forces, calculate \(\mathbf { F }\).
9 Three forces $\binom { 7 } { - 6 } \mathrm {~N} , \binom { 2 } { 5 } \mathrm {~N}$ and $\mathbf { F N }$ act on a particle.\\
Given that the particle is in equilibrium under the action of these three forces, calculate $\mathbf { F }$.
\hfill \mbox{\textit{OCR PURE Q9 [2]}}