(a(i))[1]
State the form of energy gained by the bag while it is lifted at constant speed.
(a(ii))[1]
Explain on which bag of materials the man performs more work.
(a(iii))[2]
State the two further quantities he must know.
(b)[3]
Use the letters A, B, C, D and E to finish the flow chart that shows how the power station operates. The flow chart includes the boxes: “Coal is crushed to a fine powder.”, “Hot air blows the coal powder into a furnace.”, two blank boxes, “Boiling water produces steam.”, two blank boxes, “Electricity is generated.”, and one last blank box.