速度:V=S/t;2、重力:G=mg;3、密度:ρ=m/V;4、压强:p=F/S;5、液体压强:p=ρgh。
初中物理公式:V=S/t;G=mg;ρ=m/V;p=F/S;P=F/s=ρgh;F1L1=F2L2;w=Fs=Gh;p=W/t=Fv;η=W;I=U/R=P/U;W=Pt等。
重力公式G=mg(通常g取10N/kg,题目未交待时g取9.8N/kg)同一物体G月=1/6G地m月=m地杠杆平衡条件公式F1l1=F2l2F1/F2=l2/l1动滑轮公式不计绳重和摩擦时F=1/2(G动+G物)s=2h。 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................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物理公式是初中物理的基础,学生们一定要扎实掌握,我整理了一些重要的公式。
力学
1、速度:V=S/t
2、重力:G=mg
3、密度:ρ=m/V
4、压强:p=F/S
5、液体压强:p=ρgh
6、浮力:
(1)F浮=F’-F(压力差)
(2)F浮=G-F(视重力)
(3)F浮=G(漂浮、悬浮)
7、阿基米德原理:F浮=G排=ρ液gV排
8、杠杆平衡条件:F1L1=F2L2
9、理想斜面:F/G=h/L
10、理想滑轮:F=G/n
11、实际滑轮:F=(G+G动)/n
V=S/T P=F/S
一 、欧姆定律
I=U/R
电流:I安培(A)
电压:U伏特(V)
电阻:R欧姆(Ω)
二、比热容公式
Q=cm△t
热量:Q焦耳(J)
比热容:cJ/(kg*℃)
温度差:℃。
质量:m千克(kg)
三、燃烧能量公式(热值公式)
Q=mq
热量:Q焦耳(J)
质量:m千克(kg)
热值:q焦每千克(J/kg)
四、做功公式:
W=FS或W=Gh
功:W焦耳(J)
力:F牛顿(N) 重力:G牛顿(N)
沿力移动距离:S米(m) 上升高度:h米(m)
五、功率公式:
P=W/t
功率:P瓦特(W)
功:W焦耳(J)
时间:t秒(s)
六、电功率公式
1.P=UI
功率:P瓦特(W)
电压:U伏特(V)
电流:I安培(A)
2.P=I^2R
功率:P瓦特(W)
电流:I安培(A)
电阻:R欧姆(Ω)
3.P=U^2/R
功率:P瓦特(W)
电阻:R欧姆(Ω)
电压:U伏特(V)
七、电功公式
W=Pt
电能:W千瓦时(kW*h)
功率:P瓦特(W)
时间:小时(h)
注:1.可以将上式中[P]代换为电功率1~3
2.电功率单位(千瓦时)可以换算为焦耳,1kW*h=3.6*10^6J
八、压强公式:
固体压强
P=F/S
压强:P帕斯卡(Pa)
压力:F牛顿(N)
面积:S平方米(㎡)
九、杠杆原理
F1×L1==F2×L2
F1--动力
L1--动力臂
F2--阻力
L2--阻力臂
十、液体压强公式
P=ρ液gh
ρ液--液体密度
g---9.8N/kg
h---深度
十一、液体浮力公式
F=ρ液gV排
ρ液--液体密度
g---9.8N/kg
V排---排开液体的体积 物理中考复习---物理公式
单位换算:
1 m==10dm=102cm=103mm
1h=60min=3600 s; 1min=60s
公式变形:求路程—— 求时间——
单位换算:
1kg=103 g 1g/cm3=1×103kg/m3
1m3=106cm3 1L=1dm3 1mL=25px3
G排——物体排开的液体受到的重力 N
m排——物体排开的液体的质量 kg
F浮=G排=m排g
F浮=ρ水gV排
提示:[当物体处于漂浮或悬浮时]
F浮=G
面积单位换算:
1 cm2 =10--4m2
1 mm2 =10--6m2
帕斯卡原理:∵p1=p2 ∴或
G总
G s =2 h
W=F s
单位换算:
1W=1J/s 1马力=735W
1kW=103W 1MW=106W
×100%
热量计算公式:
★电流定义式:
欧姆定律:
电功公式:
W = U I t
W = U I t 结合U=I R →→W = I 2Rt
W = U I t 结合I=U/R →→W = t
如果电能全部转化为内能,则:Q=W 如电热器。
P=I2R
串联电路的特点:
电流:在串联电路中,各处的电流都相等。表达式:I=I1=I2
电压:电路两端的总电压等于各部分电路两端电压之和。表达式:U=U1+U2
分压原理:
串联电路中,用电器的电功率与电阻成正比。表达式:
并联电路的特点:
电流:在并联电路中,干路中的电流等于各支路中的电流之和。表达式:I=I1+I2
分流原理:
电压:各支路两端的电压相等。表达式:U=U1=U2
并联电路中,用电器的电功率与电阻成反比。表达式:
初中物理想要得高分除了将知识学懂以外,还要记住各部分知识所涉及到的公式,并且要学会实际运用,这样才可以在考试时取得一个好成绩,下面是我总结的初中物理公式大全。对各位同学的复习有帮助。
速度:V=S/t;2、重力:G=mg;3、密度:ρ=m/V;4、压强:p=F/S;5、液体压强:p=ρgh。
初中物理公式:V=S/t;G=mg;ρ=m/V;p=F/S;P=F/s=ρgh;F1L1=F2L2;w=Fs=Gh;p=W/t=Fv;η=W;I=U/R=P/U;W=Pt等。
重力公式G=mg(通常g取10N/kg,题目未交待时g取9.8N/kg)同一物体G月=1/6G地m月=m地杠杆平衡条件公式F1l1=F2l2F1/F2=l2/l1动滑轮公式不计绳重和摩擦时F=1/2(G动+G物)s=2h。 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................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物理公式是初中物理的基础,学生们一定要扎实掌握,我整理了一些重要的公式。
力学
1、速度:V=S/t
2、重力:G=mg
3、密度:ρ=m/V
4、压强:p=F/S
5、液体压强:p=ρgh
6、浮力:
(1)F浮=F’-F(压力差)
(2)F浮=G-F(视重力)
(3)F浮=G(漂浮、悬浮)
7、阿基米德原理:F浮=G排=ρ液gV排
8、杠杆平衡条件:F1L1=F2L2
9、理想斜面:F/G=h/L
10、理想滑轮:F=G/n
11、实际滑轮:F=(G+G动)/n
V=S/T P=F/S
一 、欧姆定律
I=U/R
电流:I安培(A)
电压:U伏特(V)
电阻:R欧姆(Ω)
二、比热容公式
Q=cm△t
热量:Q焦耳(J)
比热容:cJ/(kg*℃)
温度差:℃。
质量:m千克(kg)
三、燃烧能量公式(热值公式)
Q=mq
热量:Q焦耳(J)
质量:m千克(kg)
热值:q焦每千克(J/kg)
四、做功公式:
W=FS或W=Gh
功:W焦耳(J)
力:F牛顿(N) 重力:G牛顿(N)
沿力移动距离:S米(m) 上升高度:h米(m)
五、功率公式:
P=W/t
功率:P瓦特(W)
功:W焦耳(J)
时间:t秒(s)
六、电功率公式
1.P=UI
功率:P瓦特(W)
电压:U伏特(V)
电流:I安培(A)
2.P=I^2R
功率:P瓦特(W)
电流:I安培(A)
电阻:R欧姆(Ω)
3.P=U^2/R
功率:P瓦特(W)
电阻:R欧姆(Ω)
电压:U伏特(V)
七、电功公式
W=Pt
电能:W千瓦时(kW*h)
功率:P瓦特(W)
时间:小时(h)
注:1.可以将上式中[P]代换为电功率1~3
2.电功率单位(千瓦时)可以换算为焦耳,1kW*h=3.6*10^6J
八、压强公式:
固体压强
P=F/S
压强:P帕斯卡(Pa)
压力:F牛顿(N)
面积:S平方米(㎡)
九、杠杆原理
F1×L1==F2×L2
F1--动力
L1--动力臂
F2--阻力
L2--阻力臂
十、液体压强公式
P=ρ液gh
ρ液--液体密度
g---9.8N/kg
h---深度
十一、液体浮力公式
F=ρ液gV排
ρ液--液体密度
g---9.8N/kg
V排---排开液体的体积 物理中考复习---物理公式
单位换算:
1 m==10dm=102cm=103mm
1h=60min=3600 s; 1min=60s
公式变形:求路程—— 求时间——
单位换算:
1kg=103 g 1g/cm3=1×103kg/m3
1m3=106cm3 1L=1dm3 1mL=25px3
G排——物体排开的液体受到的重力 N
m排——物体排开的液体的质量 kg
F浮=G排=m排g
F浮=ρ水gV排
提示:[当物体处于漂浮或悬浮时]
F浮=G
面积单位换算:
1 cm2 =10--4m2
1 mm2 =10--6m2
帕斯卡原理:∵p1=p2 ∴或
G总
G s =2 h
W=F s
单位换算:
1W=1J/s 1马力=735W
1kW=103W 1MW=106W
×100%
热量计算公式:
★电流定义式:
欧姆定律:
电功公式:
W = U I t
W = U I t 结合U=I R →→W = I 2Rt
W = U I t 结合I=U/R →→W = t
如果电能全部转化为内能,则:Q=W 如电热器。
P=I2R
串联电路的特点:
电流:在串联电路中,各处的电流都相等。表达式:I=I1=I2
电压:电路两端的总电压等于各部分电路两端电压之和。表达式:U=U1+U2
分压原理:
串联电路中,用电器的电功率与电阻成正比。表达式:
并联电路的特点:
电流:在并联电路中,干路中的电流等于各支路中的电流之和。表达式:I=I1+I2
分流原理:
电压:各支路两端的电压相等。表达式:U=U1=U2
并联电路中,用电器的电功率与电阻成反比。表达式:
初中物理想要得高分除了将知识学懂以外,还要记住各部分知识所涉及到的公式,并且要学会实际运用,这样才可以在考试时取得一个好成绩,下面是我总结的初中物理公式大全。对各位同学的复习有帮助。