physics equations Flashcards
what is the equation for distance travelled?
distance travelled = average speed * time
what is the equation for acceleration?
acceleration= change in velocity/time taken a= (v-u)/t
what is the equation for force?
force=massacceleration F=ma
what is the equation for weight?
weight=massgravitational field strength W=mg
what is the equation for efficiency?
efficiency= useful energy transferred by device/ total energy supplied to device
what is the equation for momentum?
momentum= massvelocity p=mv
what is the equation for wave speed?
wave speed=frequencywavelength v=f λ
wave speed= distance over time v=x/t
what is the equation for work done?
work done=forcedistance moved in direction of the force E=Fd
what is the equation for change in GPE?
change in GPE=massgravitational field strengthchange in height GPE=mgh
what is the equation for kinetic energy?
1/2mass(speed)^2 KE=1/2mv^2
what is the equation for power?
power=work done/time taken
what is the equation for energy transferred?
energy transferred= charge movedpotential difference E=QV
what is the equation for charge?
charge=currenttime Q=It
what is the equation for potential difference?
potential difference=currentresistance V=IV
what is the equation for power?
power=energy transferred/time taken P=E/t
what are the equations for electrical power?
electrical power=currentpotential difference P=IV
electrical power=current^2resistance P=I^2R
what is the equation for force exerted on a spring?
force exerted on a spring=spring constantextension F=kx
what is the equation for a moment of a force?
moment of a force=force*distance normal to the direction of the force
what is the equation for pressure?
pressure=force normal to surface/area of surface P=F/A
What is the equation for frequency?
1/time period
