The list of quantities, units and definitions needed for GCE 'O' Level Examination.

1. Quantity SI Unit Definition
Weight N Force on an object due to gravity
Period s Time needed to complete one oscillation
Density kg/m3 Mass per unit volume
Speed m/s Distance travelled per unit time
Acceleration m/s2 Change in velocity per unit time
Force N Rate of change in momentum
Moment of Force Nm Turning effect of a force about a point and is
calculated by multiplying the force and the
perpendicular distance from the pivot.
Work Done J Amount of energy converted by a force
acting through a distance
Power W Rate of Work Done
Pressure Pa, N/m2 Amount of force exerted normally on an
object per unit area
Specific Heat Capacity J/(kg K) Amount of heat required to raise unit mass
of a substance by unit temperature
Specific Latent Heat J/kg Amount of heat required to change the state
of a unit mass of the object without any
change in temperature
Frequency Hz Number of cycles completed per unit time
Wavelength m Distance between two successive points on
waves that are in phase
Potential Difference V Amount of energy converted to other forms
of energy when one coulomb of positive
charge passes between the points.
E.M.F V Work done by the source in driving a unit
charge round a complete circuit.