class 9 physical quantities

1. UNIT #1(lecture#2)
Topic: physical quantities
PRESENTED BY IRAM

2. PHYSICAL QUANTITIES
• DEFINATION
All quantities that can be measured are called physical
quantities
Physical quantities consists of magnitude and a unit
• EXAMPLES
Length,mass,time and temperature etc

3. TYPES OF PHYSICAL QUANTITIES
• BASE/FUNDAMENTAL PHYSICAL QUANTTIES
• DEFINATION
Those physical quantities which can’t be explained by other physical
quantities
• EXAMPLES
Length,mass,time,temperature,amount of substance,intensity of light and
electric current
• DERVIED PHYICAL QUANTITIES:
• DEFINATION
Those physical quantities which can explained by other physical
quantities
• EXAMPLE
Force ,speed ,velocity ,area ,acceleration ,density ,pressure etc