水平分位移:X = L cos37° = 75 * 0.8 = 60m
垂直分位移:Y = Lsin37° = 75*0.6 = 45m
根据y=1/2gt^2
抛体运动时间:t = 根号(2y/g) = 根号(2*60/10) = 2根号3 ≈ 3.464s
根据x=v0t
初速度:v0 = x/t = 45/(2根号3) = 15根号3 /2 ≈ 12.99m/s
答:物体抛出时速度15根号3 /2 ≈ 12.99m/s;物体从A到B得运动时间2根号3 ≈ 3.464s
水平分位移:X = L cos37° = 75 * 0.8 = 60m
垂直分位移:Y = Lsin37° = 75*0.6 = 45m
根据y=1/2gt^2
抛体运动时间:t = 根号(2y/g) = 根号(2*60/10) = 2根号3 ≈ 3.464s
根据x=v0t
初速度:v0 = x/t = 45/(2根号3) = 15根号3 /2 ≈ 12.99m/s
答:物体抛出时速度15根号3 /2 ≈ 12.99m/s;物体从A到B得运动时间2根号3 ≈ 3.464s