F'=mg+F*sin37°f=0.4F'a=(F×COS37°-f)/mS=at2(t2是t的平方）/2t=根号14
Fy=mg+F*sin37 =9.8+10*0.6=15.8f=Fy*0.4=6.32Fx=F*cos37-f=8-6.32=1.68S=0.5*a*t^2=1.12t^2=1.12/1.68t=1.15470053837925152901829
