A.一个力对物体做了1J的功,隐含条件为物体受到了1N的作用力,并且在这个力的方向上移动了1m的距离 |
B.利用激光测量月球到地球的距离,隐含条件为光的传播速度为3×108m/s |
C.如果物体做匀速直线运动,隐含的力学条件为物体受力平衡 |
D.水平桌面上静止的物体受到30N的支持力,隐含条件是物体对桌面的压力大小为30N |
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