User:Danthemango/physics/equations

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Equations useful for Grade 11 and 12 Physics I will post this on wikiversity, as soon as I see a useful place to put it.

Contents

1 Error
2 Circuits
3 Kinematics
4 Force and Momentum
5 Waves and Optics

[edit] Error

$% E r r o r = u n c e r t a i n t y / m e a s u r e * 100$
$% E r r o r = (m e a s u r e / a c c e p t e d) / a c c e p t e d * 100$
$% d i f f e r e n c e = (d i f f e r e n c e / a v e r a g e) * 100$

[edit] Circuits

$E = V * I * t$
$Q = N e -$
$V = E / Q$
$e - = 1.6 * 10 - 19$
$I = Q / t$
$R = V / I$
$P = V * I$
$P = E / t$
$P = I 2 * R$
$P = V 2 / R$
$1 K W h = 3.6 * 10 6 J$

[edit] Kinematics

$1 K m / h = 3.6 m / s$
$v = \frac{ \Delta\ d }{ \Delta\ t }$
$s = \Delta\ d/ \Delta\ t$
$a = \Delta\ v/ \Delta\ t$
$\Delta\ d=\bar{v}\ *\Delta\ t=\frac{v_1+v_2}{2}\Delta\ t$
$\Delta\ d=v_1*\Delta\ t+\frac{1}{2}*a*\Delta\ t^2$
$a=\frac{v_2-v_1}{\Delta\ t}$
$g = 9.80 m / s 2$
$v_2=v_1^2+2*a*d$

[edit] Force and Momentum

$F n e t = m * a$
$F n e t = F A - F f$
$F_f=\mu\ *F_N$
$F=k*\delta\ l$
$p = m * v$
$\Delta\ p=m*\Delta\ v=m* (v_2-v_1)=F*\Delta\ t$
$1 K g * m / s = 1 N * s$
$m 1 * v 1 + m 2 * v 2 = m 1 * v 1' + m 2 * v 2'$
$m 1 * v 1 + m 2 * v 2 = (m 1 + m 2) * v'$
$W = F A * d$
$E p = m * g * h$
$E_k=\frac{1}{2}*m*v^2$
$% Elasticity=\frac{E_k'}{E_k}$

[edit] Waves and Optics

$\frac{\lambda\ _1}{\lambda\ _2}=\frac{v_1}{v_2}$
$v=F*\lambda\$
$n=\frac{v_{vac}}{v_{med}}$
$n=\frac{-sin(c)}{sin(r)}$
$n_1*sin(\theta\ _1)=n_2*sin(\theta\ _2)$
$\frac{1}{d}=\frac{1}{f}-\frac{1}{d_0}$
$m=\frac{-d_1}{d_0}$
$n*\lambda\ =\frac{d*k_n}{l}$
$L=L_0*\sqrt{1-(\frac{v}{c})^2}$
$m=\frac{m_0}{L}*\sqrt{1-(\frac{v}{c})^2}$

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