(1)求6s末圆柱体Q对地面的压强;
(2)为不使硬杆转动,铁环P从O点开始向右运动的最长时间;
(3)试推导铁环P从O点开始运动,直到直杆AB开始转动,这一过程中,圆柱体Q对地面的压强随时间变化的数学关系式,并画出两者(p−t)关系图象,并标记出图线与坐标轴交点数值。
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