The flight instructor reported that, during the landing flare about 20 ft. above the runway, the student pilot "froze" at the flight controls. She added that, she told the student pilot, "Add power – too high", but the student did not respond. The student pilot "hung on" to the flight controls, "forcing [the] instructor to push full power and physically [take the] airplane." Subsequently, the airplane landed hard and the left wing impacted the runway.

The airplane sustained substantial damage to the left wing.

The flight instructor reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.