Fig. 4.1 shows a tractor equipped with a device used to break up soil in a field.
(a(i))[1]
A heavy weight is attached to the front of the tractor. Explain why this weight is necessary.
(a(ii))[4]
Calculate the moment produced by the device’s weight about the pivot. State the unit.
(b)[3]
Explain why wide tyres are a better choice for the tractor on soft soil.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Prevent the tractor from tipping upwards / keep the tractor level (or similar wording)” …