vx=vcos60°=240*1/2=120
vy=vsin60°=240*根号3/2=120根号3
H=vy^2/(2g)=(120根号3)^2/(2*10)=2160m
一半时间t1=vy/g=120根号3/10=12根号3
时间t=2t1=2*12根号3=24根号3
L=vxt=120*24根号3=2880根号3
vx=vcos60°=240*1/2=120
vy=vsin60°=240*根号3/2=120根号3
H=vy^2/(2g)=(120根号3)^2/(2*10)=2160m
一半时间t1=vy/g=120根号3/10=12根号3
时间t=2t1=2*12根号3=24根号3
L=vxt=120*24根号3=2880根号3