A2 Physics Lecture Notes

Course Overview

• A2 Physics consists of four papers: P1, P2, P3, and P4
• The P4 paper is worth 100 marks and focuses more on theory.
• The paper associated with ATP is considered difficult and has a higher level of difficulty.
• There is also a paper for designing and planning, which has no fixed syllabus.

Course Topics

• Circular motion, gravitation, oscillation, thermal physics, quantum mechanics, medical physics, space physics, magnetism, etc.
• The study begins with circular motion.

Circular Motion

• Circular motion means when an object moves in a circle or arc of a circle.
• There is a difference between vertical and horizontal circles.

Common Terms

• Time Period (T): The time taken to complete one revolution, T = Total Time / Number of Revolutions
• Frequency (f): How many revolutions happen per second, f = Number of Revolutions / Total Time
• Relationship: f * T = 1, f = 1/T, T = 1/f
• Linear Velocity (v): V = S/T, where S is Linear Displacement
• Angular Velocity (ω): ω = θ/T, Change of Angular Displacement with time*

Important Formulas

• V = 2πR / T
• V = 2πRF
• ω = 2π / T
• ω = 2πF
• V = Rω (this formula connects linear and angular velocity)
• S = Rθ (angular displacement)

Additional Information

• The SI unit of linear velocity is m/s
• The SI unit of angular velocity is radians/s
• To convert degrees to radians multiply by π/180
• To convert radians to degrees multiply by 180/π

Conclusion

• In circular motion, both types of circles (vertical and horizontal) provide similar formulas.
• All formulas and concepts apply to both types of circles.