Peoples Physics Book Version-3

http://www.ck12.org Concept 27. Equations and Fundamental Concepts

Favg= 4 p/ 4 t

Ug=mgh

Us p=

1

2

k( 4 x)^2

Ug=−Gm 1 m 2 /r

W=F·4x

P= 4 W/ 4 t

P=F·v

1 J=1 N·m

1 W=1 J/s

1 food Calorie=4180 J

1 ev= 1. 602 × 10 −^19 J

1 kwh= 3. 600 × 106 J

Rotational Motion

d=rθ

v=rω

a=rα

ω= 2 π/T

θ(t) =θ 0 +ω 0 t+

1

2

αt^2

ω(t) =ω 0 +αt

ω^2 =ω^20 + 2 α( 4 θ)

aC=−rω^2

τ=Iα

L=r×p=Iω

τ=r×F= 4 L/ 4 t

K= 1 / 2 Iω^2