一平抛物体,落地前1S内速度与水平面夹角由37度变为53度（1）抛出时初速度（2）在这一秒内位移 G=10m/s

落地前1s,速度度与水平面夹角37°：vy1/vo=tan37°=3/4vy1=3/4v0gt1 = 3/4 v0t1 = 3v0/(4g).(1)落地时,速度度与水平面夹角53°：vy2/vo=tan53°=4/3vy2=4/3v0gt2 = 4/3 v0t2 = 4v0/(3g).(2)t2 = t1+1∴4v0/(3g) = 3v...