(ESSENTIAL) Equations for IGCSE physics (double award) Flashcards
State the equation for average speed
average speed = total distance travelled ÷ total time taken
State the equation that relates acceleration, change in speed and time taken
a = Δv ÷ Δt
Δv means change in speed, Δt means change in time
State the equation that relates the resultant force on an object to its acceleration
F = ma
State the equation that relates the force applied to a spring to its extension
F = kx
State the equation for kinetic energy
K.E. = ½mv²
Give the equation for work done
Work done = Fd
Give the equation for density
ρ = M ÷ V
can also be written as D = M ÷ V
Give the equation for weight
W = mg
State the equation for gravitational potential energy
G.P.E. = mgh
State the equation for pressure
P = F ÷ A
Give equation that relates the initial pressure and volume of a sample of gas to its final pressure and volume (Boyle’s law)
P₁V₁ = P₂V₂
Give the equation for calculating the turning effect or ‘moment’ of a force
Moment = Fd
Give the equation that relates charge and current
Q = It
Give the equation that relates voltage and resistance
V = IR
State the equation that relates power and energy transferred
power = energy transferred ÷ time