Question

change the voice :
Stop the car

Answer 1

let the car be stopped

Answer 2

Active voice :
Stop the car .
Passive voice :
Let the car be stopped .

Rule used :

It is an imperative sentence .
So , in this an order is given .

Let + object + to + be + Verb ( 3 rd form )
Generally rule is used in these type of sentences.
When the verb expressing command , advice or request . They are changed into the passive voice, we use the our blood followed by the passive infinitive without to.
the form of the verb in the passive is- Let + be + V 3 .
The what is begin the sentence with ' you are ordered/advised/ requested to' . According to the sense of the sentence.

BE BRAINLY