A gas contained within a piston–cylinder assembly undergoes three processes in series:
Process 1–2: Constant volume from p1 5 1 bar, V1 5 4 m3 to
state 2, where p2 5 2 bar.
Process 2–3: Compression to V3 5 2 m3, during which the
pressure–volume relationship is pV 5 constant.
Process 3–4: Constant pressure to state 4, where V4 5 1 m3.
Sketch the processes in series on p–V coordinates and
evaluate the work for each process, in kJ

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s