设落地前1.4秒竖直速度为Vy1,落地时竖直速度Vy2,初速度v0,则有v0÷vy1=tan53
v0÷vy2=tan37
又vy2=vy1+gt (t=1.4)
由以上解得v0=24m/s,vy2=32m/s,又由vy2=gT,得T=3.2s,由H=1/2gt^2,得H=51.2m
设落地前1.4秒竖直速度为Vy1,落地时竖直速度Vy2,初速度v0,则有v0÷vy1=tan53
v0÷vy2=tan37
又vy2=vy1+gt (t=1.4)
由以上解得v0=24m/s,vy2=32m/s,又由vy2=gT,得T=3.2s,由H=1/2gt^2,得H=51.2m