You are using an electric forklift to load a large truck with computer boxes, as shown in the figure below. In doing this task,
chemical energy stored in the battery is changed into electrical
energy. This electrical energy is then changed by the motor into
mechanical energy to lift the boxes and move the forklift. Some
of the energy is also changed into heat.
Suppose the motor does not have enough force to carry the pallet
of boxes up the ramp. How could the ramp be changed, if at all,
so the forklift could perform the job?

I) a gas contained within a piston-cylinder assembly undergoes two processes, a and b, between the same end states, 1 and 2, where p1 = 10 bar, v1 = 0.1 m3 , u1 = 400 kj and p2 = 1 bar, v2 = 1.0 m3 , u2 = 200 kj: ' process a: process from 1 to 2 during which the pressure-volume relation is pv = constant. ' process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to state 2. kinetic and potential energy effects can be ignored. for each of the processes a and b, a) sketch the process on a p-v diagram. b) evaluate the work, in kj. c) evaluate the heat transfer, in kj.(ans : qb,12 = -65.0 kj)