A good thing to google for when looking up info about English longbows is the "Mary Rose", which is a ship that sank and took a whole bunch of archers with it.
Based on excavations, the longbows that were recovered averaged about 6'6" in length and 150 to 160 lbs draw weight, but ranged from 100 to over 180 lbs.
Bodkin arrow heads were extremely common for military use. There's conflicting anecdotal evidence that these may have sometimes pierced plate armor, but they definitely could pierce mail. It's doesn't take much to push something long and thin right between some links. On the other hand, linen gambesons/jacks/aketons can be surprisingly effective against arrows.
What's worth noting though is that arrows usually weren't immediately fatal, unless they hit something critical (heart, brain, major artery). Otherwise the wounds were often recoverable, assuming you weren't killed by something else while fighting injured, or struck someplace where it's unlikely to heal properly, at least not without infection. Fatalities frequently were much later, due to infection, and thus wouldn't necessarily remove someone from the fight, but rather limit their usefulness.