User:Joerite/physics


 * f=1/T
 * v=fλ=d/t
 * P=F/A
 * F/A=F/A
 * P=Fg/A=ρhg
 * Fbouyant=ρVg
 * α=ΔL/L1ΔT


 * F=ma=m Δv/Δt
 * FΔt=mΔv
 * FΔt=p2-p1
 * p=mv
 * $$p_a2 + p_b2 = p_a1+p_b1$$
 * $$k=\frac{1}{2}mv^2$$
 * Work=Fd
 * Work-energy thermn ΔK=W
 * $$Power=\frac{W}{t}$$
 * $$MA=\frac{F_{on machine}}{F_{by machine}}$$
 * $$Ideal MA= \frac{d_e}{d_r}$$ same as above
 * $$Eff=\frac{W_o}{W_i}100%$$
 * $$or \frac{MA}{IMA}100%$$

$$A_c=\frac{v^2}{r}=\frac{4\pi^2r}{T^2}$$


 * gravitaional feild strength=g=F/m= N per kg
 * mass-graviticat=r2Fgrav/Gm

$${\left ( \frac{T_a}{T_b} \right )}^2 ={\left ( \frac{r_a}{r_b} \right )}^3$$

$$F=G\frac{d^2}$$

$$T^2=\left ( \frac{4\pi^2}{Gm_s} \right ) r^3$$

$$v=\sqrt{\frac{Gm_e}{r}}$$

$$T=2\pi\sqrt{\frac{r^3}{Gm_e}}$$

$$d=\frac{1}{2}gt^2$$

$$t=\sqrt{\frac{2d}{g}}$$

$$v=gt=\sqrt{2dg}$$

$$x\left ( t \right ) = vt \cos \theta$$

$$y\left ( t \right ) = vt \sin \theta-\frac{1}{2} gt^2$$

$$time = \frac{2v \sin \theta}{g}$$α

$$max =\frac{v^2\sin^2\theta}{2g}$$

$$\bar v=\frac{\Delta d}{\Delta t}=\frac{d_1-d_0}{t_1-t_0}$$

$$d=d_0+vt$$

$$\bar a=\frac{\Delta v}{\Delta t}=\frac{v_1-v_0}{t_1-t_0}$$

$$v=v_0+at$$

$$d=d_0+\frac{1}{2}\left ( v+v_0 \right ) t$$

$$d=d_0+v_0t+\frac{1}{2}at^2$$

$$v^2=v_0^2+2a\left ( d-d_0 \right )$$