# ap physics b equation sheet

## 42 terms

### velocity=

original velocity +acceleration*time

### position=

original position+original velocitytime+(1/2)accelerationtime^2

### velocity^2=

original velocity^2+2*acceleration(end position-original position)

### net force=

mass*acceleration

### force of friction

≤coeficient of friction*normal force

### torque=

distanceforcesinø

mass*velocity

### impulse=

force*change in time=change in momentum

### kinetic energy=

1/2(mass)*(velocity^2)

### potential energy=

massgravityheight

### Work done on a system=

FORCEchange in distancecosø

### Power(average)=

(change in work)/(change in time)

### Power=

forcevelocitycosø

### force of a spring=

-spring constant*position form equilibrium

### potential energy of a spring=

(1/2)spring constant(distance from equilibrium^2)

### period of a spring=

2π(square root of(mass/spring constant))

### period of a pendulum=

2π(square root of(length/gravity))

1/frequency

### magnetic force=

(1/columbs law constant)((charge1charge2)/r^2)

force/charge

### electric potential energy(stored energy)=

chargeelectric potential(or called potential difference)=(1/columbs law constant)((charge1*charge2)/radius)

### average electric field=

-electric potential/distance

### capacitance=

charge/electric potential

### capacitence=

(vaccum permativity*area)/distance

### POTENTIAL(STORed energy)=

(1/2)chargeelectric potential=(1/2)capacitence*electric potential^2

∆charge/∆time

### resistence=

(resistivity*length)/area

### electric potential=

current*resistance

### electric POWER=

current*electric potential

### capacitance of a parallel

capacitance of parallel= net capacitance of individual(s)

### capacitance of series

1/capacitance of series=1/capacitance of individuals

### resistance of a series

net resistance of individuals

### resistance of a parallel

1/resistance of paralell=net 1/resistance of individuals

### magnetic force on a point charge=

point chargevelocitymagnetic field*sin ø

### magnetic force on A WIRE

magnetic fieldcurrentlength*sinø

### magnetic field=

(µ/2π)*current/distance

### magnetic flux=

magnetic fieldareacosø

### average EMF=

-(∆magnetic fluc/∆time)

### EMF=

magnetic fieldlengthvelocity