测量 序号 | 绳所受到的拉力F/N | 绳端移动的距离s/cm | 钩码所受重力G物/N | 钩码上升高度h/cm |
① | 0.7 | 20 | 10 | |
② | 1.3 | 50 | 2 | |
③ | 2.4 | 4 | 10 | |
… |
(1)实验时,应
(2)若不等式
(3)根据表中数据,可以判断:有用功最大的是第
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