Important Points: Dimensions (time, fundamental metrics, etc.)
Important Points
Best Notes: Are those that you create with love
Website: PDFs of lectures will be available on Wi-Fi Panday
Daily Practice Problem: 10 questions, to be downloaded from the site
Story: Richard and the Chess Board
Scientist: Richard
data exchange (e.g., chess board pieces and game)
Players: Sushma and Pushpa
Key Point: Scientific methods and reasoning
Physical Quantity and Its Types
Physical Quantity
Division: Basic laws and physical laws
Primary metrics: Length, mass, time, temperature, etc., are measured in measurements
Main Types:
Fundamental Units: Meter (length), kilogram (mass), second (time), kelvin (temperature), ampere (electric current), candela (luminous intensity), mole (amount of substance)
Derived Units: Area, volume, velocity, acceleration, etc.
Supplementary Units: Angle, solid angle
Fundamental Measurement Units
Length: Meter (m)
Mass: Kilogram (kg)
Time: Second (s)
Temperature: Kelvin (K)
Electric Current: Ampere (A)
Luminous Intensity: Candela (cd)
Amount of Substance: Mole (mol)
Derived Units
Area: Square meter (m²)
Volume: Cubic meter (m³)
Velocity: Meter per second (m/s)
Acceleration: Meter per second² (m/s²)
Force: Newton (N): kg·m/s²
Energy: Joule (J): N·m
Pressure: Pascal (Pa): N/m²
Dimensions
Definition: The expression of the measurement of any physical quantity
Main Dimensions: Length (L), Mass (M), Time (T), Temperature (θ), Electric Current (I), Luminous Intensity (J), Amount of Substance (N)
Dimensional Formula:
e.g.: Force (F)= [MLT^-2]
Energy (E): [ML²T^-2]
Physical Quantity Expressions and Unit Examples
Velocity: [L]/[T] = m/s
Acceleration: [L]/[T²] = m/s²
Force: [M][L][T^-2] = kg·m/s²
Energy: [M][L²][T^-2] = kg·m²/s²
Pressure: [M][L^-1][T^-2] = kg/(m·s²)
Units and Their Utility
Objective: To help measure, compare and formulate rules for physical quantities
Measurement Systems: SI unit system is the most popular
Special Points: Some units do not have a dimensional expression (like supplementary units)
Specific Concepts and Examples
Regular Quantities: Physical quantities based on standards
Miscellaneous: Examples, formulas, and equations (based on the given measurement system)
Conclusion
It's essential to understand every fundamental unit for comprehensive study
Understanding physical quantities and their units will help students in further progress