(1)用竖直向上的恒力匀加速提起箱子,B未发生相对滑动,求A、B间细线的拉力;
(2)要使(1)问中的B不发生相对滑动,应满足什么条件?
(3)如图乙所示,若将B固定于箱底,用水平向右的恒力匀加速拖动箱子,箱子与地面间的动摩擦因数,则为使A、B间细线张力为零,应满足什么条件?
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