ALL EQUATIONS Flashcards
what is the equation for density
density= mass/ time
what is the equation for speed
speed= distance/ time
what is the equation for acceleration
acceleration= speed or velocity/ time
what is the equation for force
force (N)= mass (kg) x acceleration (m/s/s)
what is the equation for weight
weight (N)= mass (kg) x gravitational field strength (m/s/s) or (N/kg)
what is the equation for momentum
momentum (kg m/s)= mass (kg) x velocity (m/s)
what is the equation for resultant force
resultant force= change in momentum/ change in time
what is the equation for impulse
impulse= force x time
what is the equation for moment
moment (Nm)= Force(N) x distance (m)
what is the equation for spring constant
spring constant = load/ extension
what is the equation for pressure
pressure (N/m2)= force (N)/ area (m2)
what is the equation for pressure in liquids
pressure in liquids= density x gravity x depth
p=pgh
what is the equation for air pressure
P1 x V1 = P2 x V2
what is the equation for work
work (J) = force (N) x distance (m)
what is the equation for gravitational potential energy
gravitational potential energy= mass x gravity x height
GPE=mgh
what is the equation for kinetic energy
kinetic energy = 1/2 mass x velocity2
KE=1/2mv2
what is the equation for efficiency
efficiency= useful work done/ total energy impute
what is the equation for power
power= work done or energy transferred/ time taken
what is the equation for useful work impute
force x speed
what is the equation for energy transferred
energy transferred (J) = mass (kg) x specific heat capacity (J/ C or K) x temperature change (Δ C or K)
or
energy transferred (J) = voltage (V) x time (s) x current (A)
or
energy transferred= mass x latent heat (fusion or vapor)
what is the equation for speed in a wave diagram
speed= frequency x wavelength
V=f x λ
what is the equation for the speed of normal sound and the speed of an echo
normal:
speed= distance travelled/ time taken
echo:
speed= distance x2/ time
