(
![](http://static.xuejinqu.com/qimg/0e2/0e2f7c9f2613e4cc906c081f680c0828.png)
(2)如图,小明沿水平方向用200N的力推一辆车匀速向左运动.用力的示意图表示车受到的阻力.
(
![](http://static.xuejinqu.com/qimg/a38/a384cb7b5b31c690af257f54f818eaf4.png)
(3)如图,用滑轮组提升物体,请画出最省力的绳子绕法.
(
![](http://static.xuejinqu.com/qimg/bc7/bc780aa688099ad29fadfcd8c3ae4297.png)
![](http://static.xuejinqu.com/images/y-prise.png)
同类型试题
![](http://static.xuejinqu.com/images/medal.png)
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
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)
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
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)