Okay.

Also,

Welcome to our

English

lecture.

Okay.

So our next

step here

is on

the introduction of

present

so that something

you already know.

So,

from the last semester,

the only

extra new point here

is that we have

various options

of how to introduce

present.

So,

the argument

is that we

consider a body

that is somehow loaded

by external forces,

maybe this one here,

and

that we then

introduce a virtual

cut into our body

and express

the

stress

revolutions that would be

necessary to keep both of

the parts in

equilibrium.

So, we could

individually use an equilibrium

which is taking

into account external forces

and the forces

that show up here,

the cut forces,

and then the forces that we

are utilizing, the forces

are then expressed in terms of

the like distributed forces