Easy -1.8 This is a straightforward recall question testing the basic definition of a couple (moment = force × perpendicular distance). It requires only one calculation step (7 × 0.2 = 1.4) with multiple choice answers provided, making it significantly easier than average A-level questions which typically require multi-step problem-solving.
A force of magnitude 7 N acts at each end of a rod of length 20 cm, forming a couple.
The forces act at right angles to the rod, as shown in the diagram below.
\includegraphics{figure_2}
Find the magnitude of the resultant moment of the couple.
Circle your answer.
[1 mark]
1.4 N m 2.8 N m 140 N m 280 N m
A force of magnitude 7 N acts at each end of a rod of length 20 cm, forming a couple.
The forces act at right angles to the rod, as shown in the diagram below.
\includegraphics{figure_2}
Find the magnitude of the resultant moment of the couple.
Circle your answer.
[1 mark]
1.4 N m 2.8 N m 140 N m 280 N m
\hfill \mbox{\textit{AQA Further Paper 3 Mechanics 2021 Q2 [1]}}