Week 10 Term 2 2026 Internal Resistance of a Battery

  Homework

Act 13A, p.222 Level 2 D.C. Circuit Revision

Act 13B, p.226-227 Internal Resistance of a Battery

Ex 6A, p.251-253 Resistor Networks

Ex 6B, P.261-262 Internal Resistance of a Battery

Electrical Charge

Current

Current is the rate of flow of Charge

I = Δq/Δt

Current

Voltage

Voltage (Potential Difference) is the change in energy (work done) to each coulomb of charge between two points on a circuit, or two points across an electric field

Voltage

Voltage (Potential Difference) is the change in energy (work done) to each coulomb of charge between two points on a circuit, or two points across an electric field

V = ΔE/Q

Ohm's Law & Resistance

Power

Circuit Symbols

Ohm's Law

Ohm's Law - PhET App

D.C. Circuit Construction Kit - PhET App

Ohm's Law

Internal Resistance of a Battery

Batteries can be thought of as having an ideal voltage supply E.M.F. (Electromotive Force) in series with an internal resistance

V = 𝛆 - Ir

How to find the internal resistance of a battery

Kichhoff's Laws

Kirchhoff’s Current Law
“At any junction in a circuit, the total current entering the junction equals the total current leaving the junction”
Kirchhoff’s Voltage Law
“Around any closed path of a circuit, the total of all the potential differences, V, is zero”

Kirchhoff's Rules for Circuit Analysis - Explanation

Kirchhoff's Rules for Circuit Analysis - Example 1

Kirchhoff's Rules for Circuit Analysis - Example 2

Kirchhoff's Rules for Circuit Analysis - Example 3

Week 8 Term 2 2026 Simple Harmonic Motion

 Homework:

2D Momentum and Centre of Mass C.O.M.

• Ex 4A, p.100-102, C.O.M.
• Ex 4B, p.108-112, Momentum & C.O.M. in 1D
• Ex 4C, p.116-122, Momentum & C.O.M. in 2D
• Act 7A, p.87-88 Motion, Force and Energy
• Act 7B, p.91-92 Impulse
• Act 7C, p.95-96 Conservation of Momentum
• Act 7D, p.100-101 C.O.M.

Circular Motion

• Act 8A, p.120-121 Horizontal Circles and Banked Corners
• Act 8B, p.124-125 Vertical Circles
• Act 8C, p.129 Sattelites
• Ex 4D, p.128-131, Banked Corners (Circular Motion)
• Ex 4E, p.138-142, Vertical Circles
• Ex 4F, p.145-147, Gravity
• Ex 4G, p.153-156 Satallites

Rotational Motion

• Act 9A, p. 139-140, Angular Motion

• Act 9B, p. 144-145, Torque - Rotational Inertia

• Act 9C, p.149-150, Angular Momentum

• Act 9D, p.153-154 Rotational Kinetic Energy

• Ex 4H, p.160-162, Rotational Kinematics

• Ex 4H, p.160-162, Rotational Kinematics

• Ex 4I, P.167-171, Rotational Force & Momentum

• Ex 4J, p.175-177, Rotational Kinetic Energy

Simple Harmonic Motion

• Act 10A, p. 148, Simple Harmonic Motion (SHM)
• Act 10B, p.153, Reference CIrcle
• Act 10C, p. 158-160, SHM - displacement, velocity, acceleration
• Act 10D, p. 164-165, Springs and Pendulums
• Act 10E, p. 172, SHM Energy, Damped, Driven, Resonance
• Ex 4K, p.184-187, Pendulums and Bouncing Springs
• Ex 4L, p.191-194, SHM

Simple Harmonic Motion - SHM

Masses & Springs PhET Lab

Simple Pendulum PhET Lab

SHM

Simple Harmonic Motion: Crash Course Physics

Pendulum Wave Demonstration

SHM & Energy

Energy of Simple Harmonic Oscillators

Damped SHM

Damping of Simple Harmonic Motion

Damped SHM & Resonance

PhET - Resonance Lab

Tacoma Bridge Collapse

How The Millennium Bridge Became The World's Most Wobbly Bridge

Week 7 Term 2 2026 Angular Momentum

   Homework:

C.O.M. & 2D momentum

• Ex 4A, p.100-102, C.O.M.
• Ex 4B, p.108-112, Momentum & C.O.M. in 1D
• Ex 4C, p.116-122, Momentum & C.O.M. in 2D
• Act 7A, p.87-88 Motion, Force and Energy
• Act 7B, p.91-92 Impulse
• Act 7C, p.95-96 Conservation of Momentum
• Act 7D, p.100-101 C.O.M.

Circular Motion

• Act 8A, p.120-121 Horizontal Circles and Banked Corners
• Act 8B, p.124-125 Vertical Circles
• Act 8C, p.129 Sattelites
• Ex 4D, p.128-131, Banked Corners (Circular Motion)
• Ex 4E, p.138-142, Vertical Circles
• Ex 4F, p.145-147, Gravity
• Ex 4G, p.153-156 Satallites

Rotational Motion

• Act 9A, p. 139-140, Angular Motion
• Act 9B, p. 144-145, Torque - Rotational Inertia
• Act 9C, p.149-150, Angular Momentum
• Act 9D, p.153-154 Rotational Kinetic Energy
• Ex 4H, p.160-162, Rotational Kinematics
• Ex 4I, P.167-171, Rotational Force & Momentum
• Ex 4J, p.175-177, Rotational Kinetic Energy

What IS Angular Momentum?

Angular Momentum

Angular Momentum - Sixty Symbols

Gyroscopic Precession

Precession of Earth

Slow Motion Flipping Cat Physics

Counter Steering Physics

The Bizarre Behavior of Rotating Bodies, Explained

Ellipzoids and the Bizarre Behavior of Rotating Bodies