# Equations for physics

Eqautions for physics which we need to know how to use and manipulate to suit the question..

:)

- Created by: Braniac
- Created on: 13-12-11 18:37

First 140 words of the document:

AS PHYSICS EQUATIONS

Unit 1

Mechanics v = u + at

s = ut + ½at2

Kinematic v2 = u2 + 2as

equations of

motion F = ma

g = F/m

W = mg

W = Fs

Forces

Ek = ½ mv2

Egrav = mgh

Work and energy

Materials F = 6rv

Stokes' law F = kx

Hooke's law

= m/V

Density p = F/A

Pressure E = / where

Stress = F/A

Young's modulus Strain = x/x

Elastic strain Eel = ½ Fx

energy

Unit 2

Waves

v = f

Wave speed

12 = sin i/sin r = v1/v2

Refractive index

Electricity

V = W/Q

Potential

difference

R = V/I

Resistance

P = VI

P = I2R

P = V2/R.

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