(a)[2]
State what the principle of conservation of energy says.
(b)[3]
Complete the labels on Fig. 3.2 to show the energy transfers.
(c(i))[3]
The machine applies a constant horizontal force of 860 N to the large box over a distance of 15 m. Show that the work done by the machine is about 13000 J.
(c(ii))[4]
Calculate the machine's power. State the unit too.