Smith grabbed the Ashes opener by the scruff of the neck with two centuries with England seemingly powerless to stop him.
But after adding express pace in Jofra Archer and most likely the left arm spin of Jack Leach to his arsenal, Root suggested they will revisit previous plans to remove Australia’s talisman.
“Later in the game, in the second innings, we tried to chase things a little bit, try to maybe be slightly too aggressive early on to him and let him get in,” said Root.
“It was a natural thing to do when you’re a bowler down and taken two early wickets and you’re trying to make the most of a lead. But then we never really managed to build any pressure throughout the rest of that innings.
“So I think we’ll go about things slightly differently. I think we had some really good plans that we put them under pressure, especially in the first innings, his first 25 runs took him a long time to get.
“It showed that we’re doing the right things, we just need to do them for longer.”
Root hinted he may leave himself the option of making a late switch from Jack Leach to Sam Curran if the first day looks like being lost to rain.
Forecasts of an opening day washout and further rain on Friday could see the second Test shortened significantly and teamsheets not exchanged until tomorrow.
But whoever is in the XI, Root said he was confident there would be huge reaction from Edgbaston in an effort to level the series.
“We really back ourselves to perform and to come back strong after last week. We’ve proven that we do that time and time again when we when we’ve been defeated, especially at home. And I’m expecting a big response from the boys.”
Root added: “Last week, will have hurt everyone and everyone will be absolutely desperate to go and win this week. And I expect nothing less.”