Figure below shows a wheel barrow of mass 15 kg carrying a load of 30 kgf with its centre of gravity at A. the points B and C are the centre of wheel and tip of the handle such that the horizontal distance AB=20 cm and AC=40 cm. Find: (a) the load arm, (b) the effort arm, (c) the mechanical advantage, and (d) the minimum effort required to keep the leg just off the ground.

Figure below shows a wheel barrow of mass 15 kg carrying a load of 30

1.	Figure below shows a wheel barrow of mass 15 kg carrying a load of 30 kgf with its centre of gravity at A. the points B and C are the centre of wheel and tip of the handle such that the horizontal distance AB=20 cm and AC=40 cm. Find: (a) the load arm, (b) the effort arm, (c) the mechanical advantage, and (d) the minimum effort required to keep the leg just off the ground.
Answer» ANSWER :(a) 20 cm (b) 60 cm, (C) 3 (d) 15 KGF.