Distance travelled
Distance travelled = average speed x time
Acceleration
Acceleration = change in velocity / time taken
Force
Force = mass x acceleration
Weight
Weight = mass x gravitational field strength
Efficiency
Efficiency = useful energy transferred by the device / total energy supplied to the device
Momentum
Momentum = mass x velocity
Wave speed (1)
Wave speed = distance / time
Wave speed (2)
Wave speed = frequency x wavelength
Density
Density = mass / volume
Work done
Work done = force x distance moved in direction of force
Change in gravitational potential energy
Change in gravitational potential energy = mass x gravitational field strength x change in vertical height
Kinetic energy
Kinetic energy = 0.5 x mass x speed(squared)
Power
Power = work done / time taken
Energy transferred
Energy transferred = charge moved x potential difference
Charge
Charge = current x time
Potential difference
Potential difference = current x resistance
Power (2)
Power = energy transferred/ time taken
Electrical power (1)
Electrical power = current x potential difference
Electrical power (2)
Electrical power = current(squared) x resistance
Force exerted from a spring
Force exerted from a spring = spring constant x extension
Moment of force
Moment of force = force x distance normal to the direction of the force
Pressure
Pressure = force normal to surface / area of that surface