(a(i))[1]
State which energy store of the barrel of fruit increases as the barrel goes higher.
(a(ii))[2]
Show that the work done in lifting the barrel of fruit from the ground up to the platform is about 450 J.
(b(i))[3]
Calculate the time needed for the machine to lift a barrel of fruit onto the platform.
(b(ii))[1]
Suggest one environmental reason for choosing wind turbines instead of a diesel (fossil fuel) generator.