本题好象不考虑重力的因素(1)显然,选手的位置为原点,发射架坐标(0,10,0)方向d1的单位向量=(4/5,0,3/5),t=10s所求向量=(0,10,0)+vt(4/5,0,3/5)=(0,10,0)+400*(4/5,0,3/5)=(320,10,240)=400.13*(0.80,0.025,0.60)(2)t=5s目标向量=(0,10,0)+vt(4/5,0,3/5)=(0,10,0)+(160,0,120)=(160,10,120)=200.25*(0.80,0.05,0.6)射击的方向(0.80,0.05,0.6)发射的时间=200.25/500=0.40秒...
|
