# Equations for physics in PDF

Some users had asked me to put the word to a pdf file so hope this helps

- Created by: Braniac
- Created on: 30-12-11 18:03

First 194 words of the document:

AS PHYSICS EQUATIONS

Unit 1 Unit 2

¥

Mechanics v = u + at Waves

· Kinematic s = ut + ½at2 · Wave speed v=f

equations of v2 = u2 + 2as

motion F = ma · Refractive index µ = sin i/sin r = v1/v2

1 2

g = F/m Electricity

W = mg · Potential V = W /Q

· Forces

¡W = F ¡s difference

¡E

Ek= ½ mv ¡

= mg h

2 · Resistance

R = V/I

· Work and energy grav

· Electrical power,

Materials F=6 ¢£rv energy and

P = VI

P = I2R

F = k ¤x

· Stokes' law efficiency P = V2/R.

· Hooke's law W = VIt

% efficiency = [useful

= m/V energy (or power)

· Density

¦

output/total energy

p = F/A (or power) input]

· Pressure 100%

· Young's modulus E = / where

Stress = F/A

Strain = x/x¤ · Resistivity R= §l/A

I = ¤Q/ ¤t

· Elastic strain

energy Eel = ½ Fx

· Current

I = nqvA

Quantum physics

· Photon Model E = hf

· Einstein's

photoelectric

hf =

max

¨ + ½ mv 2

equation

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