(i)[1]
Calculate how far the centre of mass of the object is from $B$.
(ii(a))[2]
Calculate $F$ when the force is horizontal, as shown in Fig. 1.
(ii(b))[2]
Calculate $F$ when, instead, the force is perpendicular to the rod, as shown in Fig. 2.
Mathematics 9709 · AS & A Level · Representation of data
Representation of data — practice question
The object is formed from two identical uniform rods $AB$ and $BC$, each measuring $0.6\text{ m}$ in length and weighing $7\text{ N}$. The rods are joined rigidly at $B$ and $angle ABC = 90^\circ$.