(a)[2]
Define what is meant by the torque of a couple.
(b(i))[1]
Fig. 2.1 shows a uniform rod of length $1.5\,\text{m}$ and weight $2.4\,\text{N}$. The rod is held on a pin that passes through a hole at its centre. Ropes A and B exert equal and opposite forces of $8.0\,\text{N}$. Calculate the torque on the rod caused by ropes A and B.
(b(ii))[2]
Discuss briefly whether or not the rod is in equilibrium.
(c(i))[2]
In Fig. 2.2, the rod from (b) has been taken off the pin and is now supported by ropes A and B. Rope A acts at point P $0.30\,\text{m}$ from one end of the rod, while rope B is attached at the opposite end. Calculate the tension in rope B.
(c(ii))[1]
Calculate rope A’s tension.