Equations Flashcards
What is the equation for density?
Density = mass
volume
What is the equation for distance?
Distance travelled = speed x time
What is the equation for acceleration?
Acceleration = change in velocity
time
What is the equation for kinetic energy?
2
0.5 x mass x speed
What is the equation for force?
Force = mass x acceleration
What is the equation for momentum?
Momentum = mass x velocity
What is the equation for work done?
Work done = force x distance
What is the equation for power using work done?
Power = work done
time
What is the equation for the force exerted by a spring?
Extension x spring constant
What is the equation for weight?
Mass x gravitational field strength
What is the equation for gravitational potential energy?
Potential energy = mass x height x gravitational field strength
What is the equation for pressure?
Pressure = force normal to surface/ area of that surface
What is the equation for a moment of a force?
Moment = force x distance (normal to direction of force)
What is the equation for charge flow?
Charge = current x time
What is the equation for resistance?
Resistance = potential difference
current
What is the equation for energy transferred using charge?
Energy transferred = charge x potential difference
What is the equation for power using resistance?
2
Power = current x resistance
What is the equation for power using energy transferred?
Power = energy transferred / time
What is the equation for wave speed?
Wave speed = frequency x wavelength
What is the equation for efficiency?
Efficiency = useful output energy transfer/ input energy transfer x 100%
SI unit of mass
Kg
SI unit of length
M
SI unit of density
3
Kg/m
SI unit of volume
3
M
SI unit of speed
M/s
SI unit of time
S
SI unit of acceleration
2
m/s
SI unit of force
N
SI unit of kinetic energy
J
SI unit of velocity
m/s
SI unit of momentum
kgm/s
SI unit of work done
J
SI unit of power
W
SI unit of extension
m
SI unit of spring constant
N/m
SI unit of gravitational field strength
N/kg
SI unit of pressure
Pa OR N/m
SI unit of a moment
Nm
SI unit of charge
C
SI unit of current
A
SI unit of resistance
Ω
SI unit of potential difference
V
SI unit of frequency
Hz
What is the equation for change in thermal energy using specific heat capacity?
mass x specific heat capacity x temperature change
what is the SI unit for specific heat capacity
J/kg degrees C
What does the greek letter delta mean? (it’s a triangle)
change in
What is the equation for energy produced by an immersion heater?
energy = current x time x voltage
what is the equation for thermal energy using specific latent heat?
energy = mass x specific latent heat
What is the equation for pressure at a certain depth of liquid?
Height/depth x density of liquid x gravitational field strength
What is the equation for the pressure difference at two points in a liquid
Depth difference of the two points x density of the liquid x gravitational field strength
What is the equation for work done to stretch a spring?
Work done = 0.5 x spring constant x extension^2
