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A-level 数学/OCR/M4/刚体的旋转
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来自维基教科书,开放的书籍,开放的世界
<
A-level 数学
|
OCR
|
M4
在 M1 中,你学习了五个关于匀速直线运动的公式
v
=
u
+
a
t
{\displaystyle v=u+at\,}
s
=
u
t
+
1
2
a
t
2
{\displaystyle s=ut+{\frac {1}{2}}at^{2}}
s
=
1
2
(
u
+
v
)
t
{\displaystyle s={\frac {1}{2}}(u+v)t}
v
2
=
u
2
+
2
a
s
{\displaystyle v^{2}=u^{2}+2as\,}
s
=
v
t
−
1
2
a
t
2
{\displaystyle s=vt-{\frac {1}{2}}at^{2}}
我们可以用相同的方式考虑匀角加速度下的运动
ω
1
=
ω
0
+
α
t
{\displaystyle \omega _{1}=\omega _{0}+\alpha t\,}
θ
=
ω
0
t
+
1
2
α
t
2
{\displaystyle \theta =\omega _{0}t+{\frac {1}{2}}\alpha t^{2}}
θ
=
1
2
(
ω
0
+
ω
1
)
t
{\displaystyle \theta ={\frac {1}{2}}(\omega _{0}+\omega _{1})t}
ω
1
2
=
ω
0
2
+
2
α
θ
{\displaystyle \omega _{1}^{2}=\omega _{0}^{2}+2\alpha \theta }
θ
=
ω
1
t
−
1
2
α
t
2
{\displaystyle \theta =\omega _{1}t-{\frac {1}{2}}\alpha t^{2}}
第一组公式涵盖了直线距离的位移、速度和加速度,而第二组公式涵盖了旋转物体的相同量。
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书籍:A-level 数学/OCR/M4
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