Equations Flashcards
Equation for speed
Speed = distance / time
Equation for acceleration?
Change in velocity / time taken
Equation for weight?
Mass x gravitational field strength
Equation for force?
Force = mass x acceleration
Equation for force acting (impulse) ?
Force acting = change in momentum / time taken for change to happen
Equation for momentum?
Momentum = mass x velocity
Equation for moments?
Moment = force x perpendicular distance from pivot
Equation for electrical power?
Power = current x voltage
Equation for energy transferred?
Energy transferred = current x voltage x time
Equation for voltage?
Voltage = current x resistance
Equation for charge?
Charge = current x time
Equation for wave speed?
Wave speed = frequency x wavelength
Equation for refractive index according to snell’s law?
N = sin i / sin r
Equation for refractive index?
Reflective index = speed of light in a vacuum / speed of light in that material
Equation for critical Angle?
Sin C = 1 / n
Equation for efficiency?
Efficiency = useful energy output / total energy output
Equation for work done?
Work done = force x distance
The equation for power invoking work done?
Power = work done / time taken
Equation for kinetic energy?
Kinetic energy = 1/2 x mass x velocity ^2
Equation for gravitational potential energy?
G.P.E = m x g x h
Equation for density?
Density = mass / volume
Equation for pressure?
Pressure = force / area
Equation for pressure difference ?
Pressure difference = height x density x g
Equation involving content pressure and volume?
P1 x v1 = P2 x v2
Equation involving constant pressure and temperature?
P1 / T1 = P2 / T2
Equation for transformers involving voltage and no. Turns ?
Input (primary) voltage / output (secondary) voltage = no. turns on primary / no. turns on secondary
Equation for transformers involving voltage and current?
Vp x Ip = Vs x Is
