Strata ekwipunku jest możliwa po wywrotce.

Because strata normally takes the genitive case to show loss of what.

• dictionary form: ekwipunek
• genitive singular: ekwipunku

So strata ekwipunku literally means loss of equipment.

This is a very common pattern in Polish:

• utrata czasu = loss of time
• strata pieniędzy = loss of money
• brak doświadczenia = lack of experience

So the noun after strata does not stay in the basic dictionary form.

Wywrotce is in the locative singular.

That is because the preposition po usually takes the locative when it means after.

• wywrotka = basic form
• po wywrotce = after a capsize / after overturning

So the ending changes because of the preposition:

• po kolacji
• po wypadku
• po burzy
• po wywrotce

For a learner, the key thing to remember is: po + locative = very common pattern.

Because możliwa agrees with strata, and strata is a feminine singular noun.

In Polish, adjectives must agree with the noun in:

• gender
• number
• case

Here:

• strata = feminine singular
• so: możliwa

Compare:

• wypadek jest możliwy = the accident is possible
• strata jest możliwa = the loss is possible
• problemy są możliwe = problems are possible

Here wywrotka means something like a capsize, an overturn, or a wipeout/fall causing overturning, depending on context.

It can be used in situations involving:

• a boat or kayak capsizing
• a bicycle or motorcycle tipping over
• a vehicle overturning
• sometimes a general spill/fall in sports or outdoor contexts

One thing that can confuse learners: wywrotka can also mean dump truck / tipper truck in another context.
But in po wywrotce, the meaning is clearly the accident/fall/overturning sense.

No. Możliwa means possible, not certain.

So the sentence says that loss of equipment can happen after a capsize/overturn, not that it always happens.

It suggests:

• a risk
• a possibility
• a warning

If Polish wanted to say it definitely happens, it would use stronger wording.

In a normal full sentence, yes, jest is the natural form.

• Strata ekwipunku jest możliwa po wywrotce.

Polish often omits to be only in very compressed styles such as:

• headings
• warnings
• labels
• note-like instructions

So you might also see:

• Strata ekwipunku możliwa po wywrotce.

That sounds more like a short notice or rule text.
The version with jest is the full standard sentence.

Yes. Polish word order is fairly flexible.

For example, you could also say:

• Po wywrotce strata ekwipunku jest możliwa.
• Po wywrotce możliwa jest strata ekwipunku.

These all mean basically the same thing, but the emphasis changes slightly.

• starting with po wywrotce emphasizes when/under what condition
• starting with strata ekwipunku emphasizes the loss itself

The original order sounds neutral and natural, especially in formal or instructional language.

Yes, it sounds a bit formal or instruction-like.

You might see this kind of wording in:

• safety instructions
• game messages
• manuals
• regulations
• warning notices

In more everyday spoken Polish, people might be more likely to say:

• Po wywrotce można stracić ekwipunek.
• Po wywrotce możesz stracić ekwipunek.

Those sound more direct and conversational.

Using the noun strata makes the sentence sound more official, abstract, and informational.

Compare:

• Strata ekwipunku jest możliwa po wywrotce.
  = formal, rule-like, impersonal

• Po wywrotce można stracić ekwipunek.
  = more direct: you can lose equipment after a capsize

Polish often uses noun-based wording in formal texts, just like English does in phrases such as loss of equipment is possible.

Yes, utrata ekwipunku would also be possible.

The two nouns are similar, but there is a slight nuance:

• utrata = the act/fact of losing
• strata = loss, often with emphasis on the negative result or damage

In many contexts they overlap, and both can sound formal.
In this sentence, strata ekwipunku sounds very natural if the idea is equipment loss as a possible consequence.

They are similar, but not identical.

• ekwipunek usually means gear, kit, or equipment you carry with you
• sprzęt is broader and often means equipment, apparatus, or hardware

So:

• a hiker, soldier, camper, or game character often has ekwipunek
• a machine, computer setup, or technical equipment is often sprzęt

In many situations both could be translated as equipment, but ekwipunek has a stronger sense of personal gear/loadout.

The sentence has this structure:

• Strata ekwipunku = subject noun phrase
• jest = is
• możliwa = predicate adjective
• po wywrotce = adverbial phrase meaning after a capsize/overturn

So literally, the structure is:

Loss of equipment is possible after a capsize.

This is a very typical Polish pattern:

• noun phrase
• jest
• adjective
• extra circumstance phrase

Once you recognize that pattern, the sentence becomes much easier to parse.