(a)[2]
State what the centre of gravity of a body means.
(b(i))[1]
On Fig. 3.1, indicate the position of the card’s centre of gravity and label it with the letter $C$.
(b(ii))[1]
Mark the weight of the card with an arrow labelled $W$.
(c(i))[3]
The card in (b) is released. As it swings on the rod and eventually stops, list the two forces, apart from its weight and air resistance, that act on the card while it is swinging. State where each force acts.
(c(ii))[2]
Using the completed diagram of Fig. 3.1, state the position in which the card comes to rest. Explain why the card comes to rest in this position.