Equations foe PHYs GCSEs Flashcards
Average speed, distance and time
s=d/t
mass, force and acceleration
F=ma
Mass, weight and Gravitational feild strength
W=mg
time, change in velocity and acceleration
a=v-u/t
Momentum, mass and velocity
p=mv
time, force and change in momentum
F=(change in)p/t
moment, perpendicular distance from pivot and force
moment=Fd
current, charge and time
Q=It
voltage, current and resistance
V=IR
voltage, electrical power and current
P=VI
electrical energy transferred, power, time, current, voltage and time
E=Pt=IVt
frequency and time period
f=1/t
frequency, wavelength and wave speed
v=f*lamda
sin(angle of incidence), refractive index and sin(angle of refraction)
n=sin i/sin r
refractive index and sin(critical angle)
sin c= 1/n
useful energy output, total energy input and efficiency
efficiency= useful energy output/total energy input
work done, force, distance moved in direction of force
E=Fd
energy transferred and work done
energy transferred =work done
kinetic energy, mass and velocity
Ek=1/2 x m x v*2
gravitational potential energy, mass, height and gravitational field strength
Ep=m x g x (change in)h
power, time taken and work done
P=W/t
density, mass and volume
density=m/v
area, force, pressure
p=F/A
gravity, density, height and pressure difference
p=h x density x g
