表达式5: "d" equals StartFraction, left parenthesis, "v" Superscript, 2 , Baseline minus "v" squared , right parenthesis Over 2 "a" , EndFractiond=v2−v202a
5
表达式6: "y" equals "a" left brace, "t" greater than or equal to 0 , right brace left brace, "v" greater than or equal to 0 , right bracey=at≥0v≥0
6
表达式7: "y" equals "v" left brace, "t" greater than or equal to 0 , right brace left brace, "v" greater than or equal to 0 , right bracey=vt≥0v≥0
7
表达式8: "y" equals "d" left brace, "t" greater than or equal to 0 , right brace left brace, "v" greater than or equal to 0 , right bracey=dt≥0v≥0
