The phrase "a powerful effort" is correct and usable in written English.
It can be used to describe a significant or strong attempt to achieve something, often in a context where determination or intensity is emphasized.
Example: "The team put in a powerful effort to complete the project ahead of schedule, demonstrating their commitment and teamwork."
Alternatives: "a strong effort" or "a significant effort".
With a powerful effort of will, he stood upright and came out from behind the ficus.
The Russians then mounted a powerful effort to invade Prussian Silesia with a huge phalanx of seven armies.
He clumps a powerful effort to Tatarasunu's left, he dives right, and the ball clatters the bar.
The Brazilian responded in ironic fashion by firing home a powerful effort low to the left of Howard who was rooted to his goal line.
The captain lashed home a powerful effort with 18 minutes left, responding to Eden Ben Basat's headed opener just before the break.
Juninho retook to Brazilian football in style, scoring the opener with a powerful effort before laying on another as Vasco ran out 3-1 winners.
Yet Motion's European-style training regimen got Animal Kingdom ready to deliver a powerful effort after a six-week layoff in the fifth start of his career.
Izquierdo cracks a powerful effort from 25 yards and it moves horribly in the air in front of Etheridge, who palms it over the bar.
Indeed, more followed, after Stoke had gone ahead to register only their second Premier League win so far this season, with Begovic saving both a deflected shot by Taarabt and a powerful effort from Granero, set up by Taarabt.
Massimiliano Allegri's side should have made the win more comfortable as they wasted several chances, as well as seeing Alberto Aquilani send a powerful effort crashing off the woodwork.
In April 1952, citing the president's work, the American Civil Liberties Union presented the college with an award -- also on view at the exhibition -- for "a powerful effort in behalf of academic freedom".
