SI Units

 

ALL formulae in GCE O Level Physics MUST be used with SI Units. (except kwh)

 

Example 1 :      Work done = Force x distance

Correct  : 30 J = 6.0 N x 5.0 m

Wrong ! : 30 J = 6.0 N x 5.0 cm  

 

Example 2 : Weight = mass x gravitational acceleration

 

                        Correct :  80 N = 8.0 kg x 10 m/s²

                        Wrong ! : 80 N = 8.0 g x 10 m/s²

 

 

Quantity                       SI Unit

 

Mass                            kg

 

Weight                         N

 

Force                           N

 

Length                          m

 

Distance                       m

 

Work done                   J

 

Energy                          J

 

Power                          W or J/s

 

Time                             s

 

Frequency                    Hz

 

Speed                          m/s

 

Acceleration                 m/s²

 

Moment                       Nm

 

Current                         A

 

Potential Diff. / Volt      V

 

Resistance                    Ω (ohms)

 

EMF                            V

 

Charge                         C

Mrgui                           Carrots J