[填空题]
A baseball player hits (sr2drrow(q) s )6 mexa foul ball strain 5d ln0cis;+gght up into the air. It leaves the bat with a sngci+;0ld ns 5peed of $120 \; km/h$. In the absence of air resistance, how fast will the ball be traveling when the catcher catches it? $km/h$ (please only fill in numerical value in the blank)
