(1)A与B碰撞后瞬间的共同速度为多大;
(2)AB与C达到共同速度时,此时AB离C右端的距离x多大;
(3)在C被墙壁锁定后,为了避免人碰撞到墙壁,且保证人不掉到冰面上,在AB与墙壁距离为x时,人把B以速度vB推出,B与墙壁碰后立即被锁定,试讨论vB的取值范围(答案中包含x)。
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2