Laurent Koscielny, Mesut Ozil and Olivier Giroud all managed to get on the scoresheet in the one-sided affair.
Confidence was at a low ebb for Newcastle after five straight defeats, and the last place Alan Pardew would have wanted to bring his team was into the Gunners' home patch.
After a tetchy opening period, Arsenal took control when Koscielny latched onto Santi Cazorla's in-swinging cross to prod home after the Newcastle defense opened up like the Red Sea. From there, the Gunners looked comfortable and when Ozil stabbed home from close range, just before half-time, the game was as good as over.
It was only a matter of time before Arsenal added more, and Olivier Giroud duly obliged with a well-taken header for the third.
The game then turned into something of a training session for Arsenal as the visibly demoralized Toon Army counted down the seconds until the referee's final whistle. When it did come, it offered little relief for the under-fire Pardew.
For Wenger, the win virtually guarantees Champions League football for the 17th year in a row.
Here, Bleacher Report offers five things we learned from Arsenal vs. Newcastle United...