ALL EQUATIONS! Flashcards
av speed?
av speed = distance / time
what is the equation for acceleration?
acceleration = change in velocity/ time taken
a= v-u/t
force?
f = ma
force = mass x acceleration
weight?
weight=mass x graviational field strength
moment?
moment = force x perpendicular distance from pivot
power?
power = current x voltage
P = IV
energy transferred?
energy transferred = current x voltage c time
E = I V t
voltage?
voltage = current x resistance
V=IR
charge?
charge = current x time
Q=It
energy transferred?
energy transferred = charge x voltage
E = QV
wave speed?
wave speed = frequency x wavelength
v = f x lamda
frequency?
f= 1/T
refractive index, angle of incidence, angle of refraction?
n= sin i / sin r
critical angle and refractive index?
sin c = 1/n
effeciency in energy?
useful energy output/total energy output x100%
work done?
work done=force x distance moved
ACW and CW?
ACW=CW
gravitational potential energy?
gravitational potential energy = mass x height x gravitational field strength
GPE = mgh
kinetic energy?
1/2 x mass x speed ^2
KE = 1/2. x m x v^2
power?
power = work done/time taken
P= W/tq
density?
denisty = mass / volume
p = F/A
pressure difference?
pressure difference = height x density x gravitaitonal field strength
p = h x p x g
pressure?
pressure = force / area
p = F/A
change in thermal energy?
change in thermal energy = mass x specific heat capacity x change in temperature
change in Q = change in T x c x m
pressure and kelvin temperature?
p1/t1=p2/t2
pressure and volume for a given amount of gas?
p1v1=p2v2
input and output voltage with turns?
input voltage/output voltage = primary turns/secondary turns
input and output power?
VpIp=VsIs for 100% efficiency
orbital speed?
orbital speed = 2 x pi x orbital radius / time period
v = 2 x pi x r / t
change in wavelength and galaxty stuff?
change in wavelength/ wavelength of reference galaxy = velocity of galaxy / speed of light
