Projektor ne radi, pa ćemo prezentaciju otvoriti na računalu.

In Croatian, raditi can mean both:

• to work = to do work / have a job
• to work = to function

So Projektor ne radi means The projector isn’t working / doesn’t function.

This is very common with machines and devices:

• Telefon ne radi. = The phone doesn’t work.
• Lift ne radi. = The elevator isn’t working.

You can also hear ne funkcionira, but ne radi is more everyday and natural.

Here pa means so, and so, or therefore.

It links the two ideas:

• Projektor ne radi = The projector doesn’t work
• pa ćemo prezentaciju otvoriti na računalu = so we’ll open the presentation on the computer

It shows a consequence or next step.

A useful comparison:

• jer = because
• pa = so

For example:

• Projektor ne radi, jer je pokvaren. = The projector doesn’t work because it’s broken.
• Projektor ne radi, pa ćemo koristiti računalo. = The projector doesn’t work, so we’ll use the computer.

Yes. This is the Croatian future tense.

It is formed with:

• the present tense of htjeti (to want) used as an auxiliary
• plus the infinitive of the main verb

So:

• ćemo = we will
• otvoriti = to open

Together:

• ćemo otvoriti = we will open

The future forms are:

• ću = I will
• ćeš = you will
• će = he/she/it will
• ćemo = we will
• ćete = you (plural/formal) will
• će = they will

Example:

• Otvorit ćemo prezentaciju. = We will open the presentation.

This is a very common learner question.

In standard Croatian, you normally say either:

• ćemo otvoriti
• otvorit ćemo

But not standard:

• otvoriti ćemo

Why?

Because the future auxiliary is a clitic-like form and does not normally come after the full infinitive. If it follows the verb, the infinitive usually drops its final -i:

• otvoriti → otvorit
• raditi → radit
• vidjeti → vidjet

So the standard options are:

• Ćemo otvoriti prezentaciju.
• Otvorit ćemo prezentaciju.

In your sentence, pa ćemo otvoriti... is completely natural.

Because it is in the accusative singular.

The base form is:

• prezentacija = presentation

Here it is the direct object of otvoriti:

• otvoriti što? = open what?
• prezentaciju

For many feminine nouns ending in -a, the accusative singular changes to -u:

• knjiga → knjigu
• stranica → stranicu
• prezentacija → prezentaciju

So:

• otvoriti prezentaciju = to open the presentation

Računalu is locative singular of računalo.

• računalo = computer
• na računalu = on the computer

Why na?

In Croatian, na often means on, but it is also used in many expressions where English might use on, in, or even using.

Here na računalu means something like:

• on the computer
• on a computer
• using the computer

With na + locative, the meaning is usually location or context, not motion.

Compare:

• na računalu = on the computer
• na stolu = on the table

If there were motion toward a place, Croatian might use na + accusative instead, but that is not the case here.

Usually no, not in this meaning.

Na računalu is the natural choice for on the computer when talking about working, opening files, reading something, etc.

• Otvoriti dokument na računalu = open a document on the computer
• Raditi na računalu = work on the computer

U računalu would literally mean in the computer, which sounds more like something physically or internally inside the machine.

So:

• na računalu = the normal phrase here
• u računalu = inside the computer

Because Croatian does not have articles like English a and the.

So:

• projektor can mean a projector or the projector
• prezentaciju can mean a presentation or the presentation
• na računalu can mean on a computer or on the computer

The exact meaning is understood from context.

In this sentence, the context clearly suggests:

• the projector
• the presentation
• the computer

That is very normal in Croatian.

Yes. It is used just like English open for digital files, documents, programs, and presentations.

So otvoriti prezentaciju is perfectly natural and means:

• open the presentation
• load the presentation file

Other verbs are possible in different contexts:

• pokrenuti prezentaciju = start the presentation
• prikazati prezentaciju = show the presentation

But otvoriti prezentaciju is exactly right if the idea is opening the file on a computer.

Because the sentence has two separate clauses:

• Projektor ne radi
• pa ćemo prezentaciju otvoriti na računalu

Each part has its own verb:

• radi
• ćemo otvoriti

In Croatian, it is normal to put a comma before pa when it connects two clauses like this.

So the punctuation here is standard and correct.

Yes. Croatian word order is more flexible than English, although not completely free.

The sentence you have is natural:

• Projektor ne radi, pa ćemo prezentaciju otvoriti na računalu.

But you could also say:

• Projektor ne radi, pa prezentaciju ćemo otvoriti na računalu.
• Projektor ne radi, pa ćemo na računalu otvoriti prezentaciju.
• Projektor ne radi, pa ćemo otvoriti prezentaciju na računalu.

These all mean roughly the same thing, but the emphasis changes a little.

The version you were given sounds smooth and neutral.

Yes, računalo is the standard Croatian word for computer.

You may also hear:

• kompjutor
• sometimes kompjuter in informal speech, depending on region and speaker

But računalo is the safest and most standard choice, especially in learning materials, writing, and formal Croatian.

So:

• na računalu = standard
• na kompjuteru/kompjutoru = informal/colloquial variants

A simple pronunciation guide:

• ćemo sounds roughly like CHE-mo, but with a softer ć sound than English ch
• računalu sounds roughly like RAH-choo-nah-loo
• prezentaciju sounds roughly like preh-zen-TAH-tsee-yoo

A few useful notes:

• č is a hard ch sound, like in church
• ć is softer than č
• č appears in računalu
• c in Croatian is pronounced ts

So in prezentaciju, the c is not like English k or s by itself, but ts.

Not exactly.

• Projektor ne radi = The projector doesn’t work / isn’t working
• Projektor je pokvaren = The projector is broken

The first one only tells you that it is not functioning. It does not necessarily say why. Maybe it is unplugged, maybe there is a technical issue, maybe something else is wrong.

So ne radi is broader and more neutral than je pokvaren.