A.小强在木箱下垫上几根圆木棍,推起来很轻松,是因为滚动摩擦比滑动摩擦小 |
B.小丽尽全力搬一块大石头,虽然没有搬动,但是她也对石头做了功 |
C.小红向地面上泼水,盆虽然留在手中,但是水却由于惯性而“飞”了出去 |
D.小刚用力推垃圾桶,将它推到另一个位置,是因为力可以改变物体的运动状态 |
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