trailer
10m
30 kN
10m
X
cab
(a) Identify the point which will act as a fulcrum of this design of the lorry when it is
carrying a load on its trailer.
(b) Work out the clockwise moments about the fulcrum you have identified in part (b)
above.
(c) Hence find the amount of force applied on the point X where the trailer is connected
to the cab of the truck.
(d) If you are the advisor to the designer, suggest two changes you would wish to make
to the design of trailer of the track in order to increase load carrying capacity and
lessen force on point X of the cab.
(e) Predict what would happen to the size of a force applied on point X if another set of
tires were added right next to the only tires on the trailer