a → ( t ) = g → − a 0 → ( a x t + a x 0 ) 2 + ( a y t + a y 0 ) 2 ) m ( k t ( a x t + a x 0 ) 2 + ( a y t + a y 0 ) 2 ) m + 1 {\displaystyle {\vec {a}}(t)={\frac {{\vec {g}}-{\frac {{\vec {a_{0}}}{\sqrt {(a_{x}t+a_{x_{0}})^{2}+(a_{y}t+a_{y_{0}})^{2})}}}{m}}}{{\frac {(kt{\sqrt {(a_{x}t+a_{x_{0}})^{2}+(a_{y}t+a_{y_{0}})^{2})}}}{m}}+1}}}
