We know that the work done by any thermodynamic process is, in general, found by the relation: , = − 8 /01 23 24 Using the Ideal Gas Law (PV=nRT), derive relations for the amount of work done in a system during a process in which: 1. P is constant (isobaric process) 2. T is constant (isothermal process)

he made 11 calls in one day

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