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Summary Section 1: Further Mechanics

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  • Course
  • Unit 4 PHYA4 - Fields and Further Mechanics
  • Institution
  • AQA
  • Book
  • A-Level Physics for AQA

The following documents follow the AQA A-Level specification for Physics (as of 2019). This document focuses on chapter 4 (Capacitance). It should also be noted that I have created and used these notes - and achieved an A grade in Physics.

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  • No
  • Chapter 1: further mechanics
  • June 24, 2019
  • 8
  • 2018/2019
  • Summary

Subjects

  • physics
  • mechanics
  • a level
  • as level
  • further mechanics
  • chapter 1
  • paper 1
  • circular motion
  • centripetal force
  • acceleration
  • shm
  • simple harmonic motion
  • free and force vibrations
  • resonance
  • graphs
  • simple pendu

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  • Section 4: Capacitance
  • Section 5: Magnetic Fields
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  • AQA
  • Phsyics
  • Unit 4 PHYA4 - Fields and Further Mechanics
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Section 1:
Further Mechanics


Circular Motion

 To convert from degrees to radians: multiply the degree angle by π/180

Angular Speed:

 This is the angle an object rotates through per second

𝛳 (𝑟𝑎𝑑)
𝜔 (𝑟𝑎𝑑 𝑠 −1 ) =
𝑡 (𝑠𝑒𝑐𝑜𝑛𝑑𝑠)

- 𝜔 – Angular speed
- 𝛳 – Angle the object turns through
- 𝑡 – time

Considering that Speed = distance / time:

𝑟𝛳(𝑎𝑟𝑐 𝑙𝑒𝑛𝑔𝑡ℎ)
𝑣=
𝑡

𝑣 (𝑚𝑠 −1 )
𝜔 (𝑟𝑎𝑑 𝑠 −1 ) =
𝑟 (𝑚)

Frequency and period:

 The frequency is the number of complete revolutions that occur in one second (rev s-1)
 The period is the time taken for a complete revolution (in seconds)

1
𝑓=
𝑇

For a complete circle, an object turns 2π radians in time T. So, the equation for angular speed becomes:

2𝜋
𝜔=
𝑇

By combining the two equations, we get:



𝜔 = 2𝜋𝑓

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