Section 4: Energy resources and energy transfer

a) Units
b) Energy transfer
c) Work and power
d) Energy resources and electricity generation

a) Units

Examiner's expection: 4.1 Students will be assessed on their ability to use the following units: kilogram (kg), joule (J), metre (m), metre/second (m/s), metre/second2 (m/s2), newton (N), second (s), watt (W).

 

S.NoQuantity with DefinitionunitSymbol represention of unit
1

Mass

Definition: quantity of matter in a body.

Kilogram Kg
2

Energy

Definition:Ability to do work.

 

Joules J
3

Work Done:


Exam definition

Work done = Force x distance

Also

Work done = Energy Transferred

Joules J
3

Distance:

Definition: measurement between two points

Meter M
4

Speed/velocity

Definition: Distance covered per second.

Meter/ second m/s