(1)实验时,下列必要的操作是
A.用天平测出重物和遮光条的总质量为m
B.将长木板不带滑轮的一端略微垫高以补偿阻力
C.调整滑轮及力传感器的位置,使绳子处于水平状态
D.为减小实验误差,实验中一定要保证重物及遮光条的总质量远小于滑块的质量
(2)测量遮光条宽度时,游标卡尺的示数如图乙所示,则遮光条的宽度d =
(3)某次实验时光电门显示遮光时间Δt=0.024s,则遮光片通过光电门时的速度v =
(4)以F为纵坐标,为横坐标,作图如右图所示,已知直线的斜率为k,截距为b,则滑块的质量M=
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