Be Physically Ready

Physics and James: A simple guide

Gay Formulae:

Speed: v = d/t (m/s)
Velocity: v=s/t (m/s)
Acceleration: a = (u-v)/t (m/s^2)

Force: F=ma (Newton: N, kg/ms^2)

Density: r=m/V (kg/m^3, g/cm^3 Þ 1000kg/m^3=1g/cm^3)
Weight: W=mg (N)

Moment = F x d (Nm)
Work: W=F x s (Nm, 1J=1Nm)
Energy:
Gravitational Potential NRG: E(p)=mgh (J)
Kinetic NRG: E(k)=(1/2)mv^2 (J)
E=IVt (J)
Power: P=W/t=E/t (Watt, J/s)
P=IV (W)

Pressure:
p=F/A (Pascal: Pa, N/m^2)
p=hrg (Pa)
P(1)V(1) = P(2)V(2) (Bubble size)
P(y)=P(x)
F(y)/A(y)=F(x)/A(x)
F(y)=(F(x)/A(x)) x A(y) (Hydraulic Pump)
pµ1/V (Gas, small volume, big pressure)

Temp:
q/°C=T/K-273
q/°C=(X(unknown)-X(0))/(X(100)-X(0)) x 100

Heat:
C=Q/Dq (J/K or J/°C)
c=(1/m)(Q/Dq) (J/Kg K or J/Kg °C)
L(f/v)=l(f/v) x m (l(f/v) in J/kg)

Wave:
T=1/¦ (s)
v=¦l (m/s, Hertz=1 complete wave in 1 second)

Light:
n=(sin i)/(sin r) (Snell’s law)
n=c/v (c=3x10^8 in vacuum)
n=(real depth)/(apparent depth)
n=1/(sin c) (c=critical angle)
sin c=1/n (°)

Linear magnification: m=v/u=h(i)/h(o)

Electricity:
C=6.25 x 10^18
Charge on electron or proton = 1.6 x 10^(-19) coloumbs
I=Q/t (A)
V=W/Q (V)
E(e.m.f.)=W/Q (V)
R=V/I (W, Ohm’s law)
Rµl/A
R=r(l/A)
r=R(A/l) (Resistivity, Wm)
P=IV
E=IVt
1 kwh = 1000W x (60 x 60)s = 3.6MJ (Mega = 1 x 10^6)

Transformer:
V(s)/V(p) = N(s)/N(p)
I(s)V(s)=I(p)V(p)

Mr Einstein:
E=mc^2


Any missing stuff, please tag on my board? I need to know too haha. Some symbols din appear, like density, and this µ here is inversely proportional... Yea more to come for other subs I hope!