General Physics

Front 1

Newtonian Motion

Back 1

x(t) = x + vt + (1/2)at^2

Front 2

vector components (x and y)

Back 2

x= rcos(theta)
y= rsin(theta)

Front 3

Friction

Back 3

Proportional to the normal force on the body in contact with the surface

F = ("mu")mg for a horizontal surface

(mu times force 90 degrees to the normal force if otherwise)

Front 4

centripetal acceleration

Back 4

a = v^2/ r

Front 5

PE

Back 5

mgh

Front 6

KE

Back 6

(mv^2)/2

Front 7

momentum

Back 7

p = mv

Front 8

work

Back 8

force over a distance
w = force*distance

Front 9

power

Back 9

P = work/time

Front 10

impulse

Back 10

change in momentum

Front 11

fluid pressure

Back 11

Pfluid = Patm + pgh

Front 12

change in fluid pressure

Back 12

change in Pfluid = pg(change in h)

Front 13

Bernoulli's fluid flow

Back 13

P + (1/2)pV^2 + pgy is constant for any point y in the flow

Front 14

bouyancy

Back 14

Fb = pVg
whereas V is the volume of fluid displaced by the buoyant object

Front 15

sound speed in fluid

Back 15

c in fluid = sqrt(Bc/P)

Front 16

speed of sound in air

Back 16

c in air = sqrt(gammaRT/M)

Front 17

loudness in dB

Back 17

B(dB) = 10log(I/Io)

Front 18

Doppler

Back 18

freq observ = (f actial)(1 +/- (u/v))


whereas u is the speed of the observer relative to the speed of the sound, v

Front 19

Force of Electricity

Back 19

Fcoulomb = k(q1q2/r^2)

Front 20

Voltage

Back 20

V = k(q/r)

Front 21

dielectrics affect voltage

Back 21

V(k) = (1/k)V

Front 22

dielectrics affect electric force

Back 22

F(k) = (1/k)F

Front 23

Capacitance

Back 23

C = Q/V or e"not"A/d

Capacitors hold equal and opposite charge

Front 24

Energy stored in a capacitor

Back 24

Ustored = (1/2)Q^2 = (1/2)QV = (1/2)CV

Front 25

Electric Field

Back 25

E = V/d
or Q/(e"not"A) for capacitors

Front 26

Parallel plate capacitors with dielectrics

Back 26

C = (k(e"not")A)/d
= kC

Front 27

Capacitors in series

Back 27

1/C = 1/C +1/C2...etc

Front 28

Capacitors in parallel

Back 28

C = C + C2 + C3 .....etc

Front 29

Resistance

Back 29

R= V/I

(V=IR)

Front 30

Resistance in series

Back 30

R in series = R + R1 + R3 + .....

Front 31

Resistors in parallel

Back 31

1/R = 1/R + 1/R2 + 1/R3 + ...etc

Front 32

Direct Current emf

Back 32

emf = Vb + IR
with resistance Vb = 1R

Front 33

Force of a magnetic field

Back 33

Fmag = qvBsin(theta)

Front 34

right hand rule for magnetic fields

Back 34

pointing like a pistol, the thumb is the force of the magnetic field, the pointer finger is the direction of the magnetic field, and the middle finger is the direction of the current

Front 35

Energy of a magnetic field

Back 35

Emag = MB

whereas M, the magnetic moment, is IA

Front 36

Magnetic fields exert force on current which is...

Back 36

F on q by B = qE + qvB

Front 37

wires with current have a magnetic field described by the right-hand-rule...

Back 37

holding the wire with the right hand, thumb in the direction of the current, the curled fingers represent the direction of the magnetic field

Front 38

Gauss's law

Back 38

net flux through a closed surface is always zero

Front 39

Induction of current by motion of a magnetic field

Back 39

emf = -Blv

whereas "l" is conductor length

Front 40

index of refraction

Back 40

n = (c in a vacuum)/(c in the medium)

Front 41

For reflected light, the incident and reflected beams must have...

Back 41

the same angle to the surface angle

Front 42

Snell's Law

Back 42

n1sin(theta) = n2sin(theta)

Front 43

mirror equation

Back 43

1/s + 1/s = 1/f


s/s' = n/(-h) = M

1/f = 1/f1 + 1/f2

Front 44

lens lines

Back 44

one from object to focal length, parallel through the lens

one from object through the center of the lens unbroken to the image

one from the object, parallel to the floor, then through the second focal point to the image