essential equations Flashcards
the relationship between average speed, distance moved and time taken:
speed = distance / time
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
the relationship between work done, force and distance moved:
work done = force x distance moved
energy transfered
energy transfered = work done
kinetic energy
kinetic energy = 0.5 × mass × speed^2
formula for velocity using kinetic energy
√kinetic energy / 0.5 x mass
gpe
gravitational potential energy = mass × g × height
the relationship between mass, weight and gravitational field strength:
weight = mass x gravitaional feild strength
the relationship between an applied force, the area over which it acts and the resulting pressure:
pressure = force / area
formula for charge
charge = current x time
formula for voltage
voltage = current x resistance
formula for electrical power
electrical power = voltage x current
the relationship between speed, frequency and wavelength of wave:
wave speed = frequency x wavelength
the relationship for efficiency:
efficiency = (useful energy output / total energy input) x 100
