 ## Understanding Circular Motion

This video presents a beginner’s guide to circular motion, introducing the concept of centripetal force. It also briefly discusses the erroneous term centrifugal force. It also explains the motion with some common examples.   Clarification: in the video I mention that ‘there is no centrifugal force” What I mean is, there is no centrifugal force acting on the object spinning, like some outward force acting on the object. This is fictitious.   I the specific case of a car going around the bend, the centripetal force is provided by the road surface on the car, going inward   One could…

## Understanding vectors

This video address all three questions in a way that helps you understand the importance of vectors in Physics

## The equations of motion

In this short video I run through the 5 equations of motion, used in kinematics, and how they are derived.

## true lies projectile analysis

Using projectile motion, we analyse a scene from James Cameron’s blockbuster, ‘True Lies’, to see if a terrorist can jump from a building to a pool in another building, whilst being chased by Arnie on a horse.

## motion graphs explained

An explanation of motion graphs using two simple scenarios – constant velocity and constant acceleration. With the use of pHET animation.

## Gravitational potential energy explained

In this video, I briefly discuss gravitational potential energy (PE = mgh) as assumed knowledge and move not o understanding GPE in the larger scale, as gravity changes. I discuss how the formula comes about and what it look graphically.

## Rocket Launch Physics Explained

How do Newton’s Laws apply to a rocket launch? Using data from a simulation by Robert A. Braeunig, I present graphs of various measurements to explain Newton’s in the context of the multistage rocket Saturn V. In particular I explain how the g forces change for the astronauts as they ascend into orbit.   For those doing the NSW HSC, this video address the following dot point (though I do not specifically address LCM) analyse the changing acceleration of a rocket during launch in terms of the: – Law of Conservation of Momentum – forces experienced by astronauts

## Orbital Velocity Explained

In this video I discuss the connection between gravity and circular motion, involving satellites. I thus derive the formula used for orbital velocity of a satellite moving in a circular path   For those doing the HSC Physics course, this video addresses the following dot points • analyse the forces involved in uniform circular motion for a range of objects, including satellites orbiting the Earth • define the term orbital velocity and the quantitative and qualitative relationship between orbital velocity,the gravitational constant, mass of the central body, mass of the satellite and the radius of the orbit using Kepler’s Law…

## Kepler’s Three Laws Explained

Do you know Kepler’s Laws of Planetary Motion? Do you know how they came about? This video covers that, explains how Newton confirmed them and goes through a worked example of applying Kepler’s Third Law

## projectiles – why 45° give you max range

Have you ever wondered why 45° gives you maximum range? Did you know that for every angle of launch there is another angle that gives you the same range. In this video I show how you can prove both mathematically, simply using the equations of motion.

## Motors vs Generators – explained

Using a demonstration motor, I explain how a motor works, how a generator work, what their similarities are and what their difference are

## JJ thomson and his electron

In this video I review, with the physics explained, how JJ Thomson discovered the electron I briefly review the history prior and also touch on electric fields, magnetic fields and circular motion and how they all contribute to JJ Thomson’s discovery

## galvanometer

In this video I look an application of the motor effect – the galvanometer

## Understanding force between current bearing wires

So why do current bearing wires attract? Why are their spacer between high voltage power lines? In this video I demonstrate and explain why current bearing wires experience a force between each, all due to the motor effect!.

## Eddy and Lenz’ Law Explained

This video covers eddy currents and Lenz’ Law using the well known demonstration of dropping a rare earth magnet down an aluminium tube.

## how speaker works

A short video that explains the physics of a speaker. This video covers the dot point (in the NSW physics syllabus) • identify data sources, gather and process information to qualitatively describe the application of the motor effect in: the loudspeaker

## back emf explained

In this video I discuss the nature of back emf and why a motor burns out when it’s suddenly stops

## Wien’s Law

A short overview of Wien’s Law using the animation from pHET

## Solar Cells simplified

Want to know how a solar cell works. Here is a summary of how a solar cell functions, utilising two key physics concepts – semiconductors and the Photoelectric Effect

## Hertz and Radio Waves Explained

This video examines the experiment Hertz performed to validate Maxwell’s prediction for electromagnetic waves. It also touches on his observation of the photoelectric effect. Prepared to help students doing the HSC in Australia, it is suitable in other jurisdictions as well.