(a)[2]
Water has a density of $1000\,\text{kg m}^{-3}$. Calculate the volume of water in the tank when it is full.
(b(i))[1]
At the beginning of the journey, the tractor and tank accelerate from rest along a straight, horizontal road. As their speed rises, one form of energy decreases. State the name of the form of energy that is decreasing.
(b(ii))[2]
Explain where this energy is transferred.
(c)[2]
The village sits on a mountain, 850 m vertically above the water supply. The gravitational field strength $g$ is $10\,\text{N kg}^{-1}$. Calculate the gravitational potential energy gained by the water during transport from the supply to the village.