Examinations

To sit the exams successfully, students must learn the following formulae for relationships between physical quantities. We will not provide these formulae to students in the exam.

Relationship between:
speed, distance and time:	Speed = distance time taken
force, mass and acceleration:	Force = mass x acceleration Acceleration = change in velocity time taken
density, mass and volume:	Density = mass volume
force, distance and work:	Work done = force x distance moved in direction of force
mass, weight and gravitational field strength:	Weight = mass x gravitational field strength
an applied force, the area over which it acts and the resulting pressure:	Pressure = force area
the moment of a force and its distance from the pivot:	Moment = force x perpendicular distance from pivot
charge, current, voltage, resistance and electrical power:	Charge = current x time Voltage = current x resistance Electrical power = voltage x current
speed, frequency, and wavelength:	Wave speed = frequency x wavelength
the voltage across the coils in a transformer and the number of turns in them:	voltage across secondary = number of turns in secondary voltage across primary number of turns in primary

Energy relationships:
speed, distance and time:	Energy transferred = work done Kinetic energy = ½ x mass x speed ² Change in potential energy = mass x gravitational field strength x change in height