MCAT Physics Units/formulas

force units

F=ma

newtons = kg*m/s^2

torque units

T=rFcosθ

[newton-meters = N*m]

momentum

P= mv

[kg*m/s]

impulse

J= Ft

J=Δp

[newton-seconds = N*s]

work units

joules = J = kg*m^2/s^2

energy units

joules = J = kg*m^2/s^2

power units

watts = W = J/s

pressure

P=F/A

[pascals = Pa = N/m^2]

density units

ρ= m/v

kilograms per cubic meter = kg/m^3

flow rate

Q=va

m^3/s

electric charge

coulombs = C

electric field

newtons per coulomb = N/C (or volts per meter = V/m)

electric potential

E= qV

[Joules]

voltage

V=IR

[volts = V = J/C]

current

I= V/R

I=Q/t

[amps = A = C/s]

resistance

R=V/I

R=ρL/A

[ohms = Ω = V/A]

resistivity

ohm-meters = Ω*m

capacitance

farads = F = C/V

magnetic field

teslas = T = N/A*m

frequency

hertz = Hz = s^-1

period

seconds = s

sound level

decibels = dB

lens power

P= 1/f

[diopters = D = m^-1]

(3) kinematics

Δv=at

v^2=Vi^2 + 2a(Δx)

Δx=vt+2at^2

force of gravity

f= GmM/r^2

Friction (static and kinetic)

Fstatic< μN

Fkinetic= μN

Power

Work/time

Work

=Fdcosθ (Force x distance)

=ΔE

Kinetic, Potential Energy

KE=1/2mv^2

PE=mgh

Uniform Circular motion

F=mv^2/r

a=v^2/r

specific gravity

=ρ/ρ water

archimedes principle

F=ρ(w) V(o) g

[ρ of water; V of object]

hydrostatic pressure

=P+ρgh

Bernoulli's Equation

P +ρgh + 1/2ρV^2

Resistors in series and parallel

Series= ΣR

(I stays the same)

Parallel= (Σ1/R)^-1

(v stays the same)

Capacitors in series and parallel

Series= (Σ1/C)^-1

Parallel= ΣC

Power in a circut

P=IV

=I^2R

=V^2/R

Power AC circuts

Imax and Vmax

P= IV

=Imax/√2

= Vmax/ √2

Hooke's Law

F=-k(Δx)

Harmonics equations

(open-open; closed-closed)

(open-closed)

O-O/C-C:

f=nv/2L

λ= 2L/n

O-C:

f=nv/4L

λ= 4L/n

Intensity

Power/Area

[W/m^2)

doppler

fo = fs (V ± vo )/( V ± vs )

heat of fusion

Q = mcΔT

index of refraction

n = c/v

snell's law

n(sinθ) = n(sinθ)

Coulomb's Law

F =kqQ/r^2

force of two charges on each other

Electric field due to Q

E= kQ/r^2

Force of electric field

F=qE

Electric potential due to Q

=kQ/r

[in V, Volts] = J/C

Energy of a photon

E=hf

Mirror-Lens Equation

1/o + 1/i = 1/f

Focal length

f=R/2

magnification

m=-i/o

Magnetic force

F= qvBsinθ

PE stored in capacitor

E=1/2QV

Charge

Q=VC