(a)[1]
State the meaning of the moment of a force about a point.
(b(i))[1]
Calculate the rod's weight W.
(b(ii))[2]
Calculate the moment about the pivot due to W.
(b(iii))[1]
Calculate the moment about the pivot due to F.
(b(iv))[2]
Calculate the value of F.
(c)[2]
As the angle between the rod and the vertical is increased, state whether the force F needed to keep the rod stationary should increase, decrease, or remain unchanged. Explain your reasoning.