In this case, there is a slight brushing of calf and foot while the White girl maintains and does not alter stride. The Black girl cannot recover control of her foot direction quickly enough to prevent tripping herself.
It is important to note the White girl did not alter stride, indicating the contact was accidental and she did not direct her leg in a manner to deliberately interfere with the Black girl's foot.
The reaction of the Black girl shows prejudice in her evaluation of the White girl and her motivation in the game, in addition to simple unprovoked assault. and battery.
Banning from sports, criminal conviction, a period of incarceration, expulsion from school, and mandatory anger management and racial sensitivity counseling should be required.
Excellent narrative and observations!