Peoples Physics Book Version-3

http://www.ck12.org

x(t) =x 0 +v 0 t+

1

2

axt^2

v(t) =v 0 +at

v^2 =v^20 + 2 a( 4 x)

(x=x 0 andv=v 0 att= 0 )

g= 9 .81 m/s^2 ≈10 m/s^2

1 km=1000 m

1 meter= 3 .28 ft

1 mile= 1 .61 km

Newtonian Physics and Centripetal Motion

a=Fnet/mFg=mg

Fnet=ΣFall f orces=ma

fk=μkFNFs p=−k( 4 x)

fs≤ μsFNFG=Gm 1 m 2 /r^2

FC=mv^2 /r

G= 6. 672 × 10 −^11 N·m^2 /kg^2

1 kg=1000 g= 2 .2 lbs

1 N=1 kg·m/s^2

Momentum and Energy Conservation

Σpinitial=Σpf inal

Einitial=Ef inal

E=K+U+W

p=mv

K= 1 /2 mv^2