(1)当柱形容器中无液体时,配重C的质量为0.8kg,杠杆处于水平位置平衡,求动滑轮重力是多少?
(2)当柱形容器中加入质量为m1=2kg的水时,为使杠杆在水平位置平衡,求配重C的质量为多少?
(3)如果剪断物体A上方的细线,向容器中加水,直到容器中水的质量为m2=4.2kg,物体平衡时,水对物体B上表面的压力FB是多大?
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