Exam Equations Flashcards
The relationship between average speed, distance moved and time taken
Average speed = Distance moved / Time taken
The relationship between force, mass and acceleration
Force = Mass x Acceleration
The relationship between acceleration, change in velocity and time taken
Acceleration = Change in velocity / Time taken
The relationship between momentum, mass and velocity
Momentum = Mass x Velocity
The relationship between density, mass and volume
Density = Mass / Volume
The relationship between work done, force and distance moved
Work done = Force x Distance moved
The relationship between energy transferred and work done
Energy transferred = Work done
The relationship for kinetic enegy
KE = 1/2 x mass x speed squared
The relationship for gravitational kinetic energy
GPE = mass x gravitational field strength x height
The relationship between mass, weight and gravitational field strength
weight = mass x gravitational field strength
The relationship between an applied force, the area over which it acts and the resulting pressure
Pressure = Force / Area
The relationship between the moment of a force and its perpendicular distance from the pivot
Moment = Force x Perpendicular distance from the pivot
The relationship between charge, current and time
Charge = Current x Time
The relationship between voltage, current and resistance
Voltage = Current x Resistance
The relationship between electrical power, current and voltage
Electrical power = Current x Voltage
The relationship between speed, frequency and wavelength of wave
Wave speed = Frequency x Wavelength
The relationship between refractive index, angle of incidence and angle of refraction
n = sin (i) / sin (r)
The relationship between refractive index and critical angle
sin (c) = 1/n
The relationship for efficiency
Efficiency = (Useful energy output / Total energy output) x 100
The relationship between turns and voltage for a transformer
Input voltage / Output voltage = Primary turns / Secondary turns
The relationship between voltage and current for a transformer
Primary voltage x Primary current = Secondary voltage x Secondary current
The relationship for pressure difference
Pressure difference = height × density × gravitational field strength
