w1=f*s1
w2=f*s2
w1:w2=s1:s2
s1=[(0+v)/2]*t1=(v/2)*(v/a)=1/(2a)
s2=[(v+2v)/2]*t2=(3v/2)*(v/a)=3/(2a)
所以w1:w2=1:3