A.仅改变球的质量,其余条件不变,为保证正方体仍处于静止状态,球的质量应小于 |
B.将正方体向左推动很小一段距离,其余条件不变,系统仍保持静止,正方体受到的摩擦力不变 |
C.当正方体的右侧面AB到墙壁的距离小于时,无论球的质量是多少,正方体都不会滑动 |
D.改变正方体到墙壁的距离,系统始终保持静止,则的最大值为 |
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