We hear about voltage, but do you really understand its meaning? This video discusses the concept of potential, more commonly known as voltage, and its connection to energy.
So we know that lenses can magnify but why does a lens have the ability to display an image? In this video, I discuss why a converging lens can form real images as well as look at the factors that determine its characteristics. Using a clear explanation with animations, I help you understand the optics from a high school perspective
The third law is often described as ‘every action there is an equal but opposite reaction’. I present a better way of stating the 3rd , with lots of examples.
An explanation of flux and how a changing flux leads to an EMF Covers Faraday’s Law too.
A quick explanation of a transverse wave using pHET animation
In this video, I go through wave interference using the excellent animation from pHET. I discuss constructive and destructive interference from a 2D perspective.
In this video, I go through wave interference / superposition. I discuss constructive and destructive interference from a 1D perspective. For NSW students, it covers the content from the Year 11 World Communities unit (8.2), namely • describe the principle of superposition and compare the resulting waves to the original waves in sound
In this video I explain a simple, a series, and a parallel circuit in terms of an analogy using a slide. I thereby explain how voltage and current are measured. Suitable for senior classes as well as junior classes of science
What are the Physics principles involving a car crash? How do forces, work, energy, and momentum apply? In this video I will discuss these terms in a way that will help you understand those concepts in the context of a car crashing in a wall – first at 60kph and then 100kph.
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…
This video address all three questions in a way that helps you understand the importance of vectors in Physics
In this short video I run through the 5 equations of motion, used in kinematics, and how they are derived.
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.
An explanation of motion graphs using two simple scenarios – constant velocity and constant acceleration. With the use of pHET animation.
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.
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
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…
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
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.
Using a demonstration motor, I explain how a motor works, how a generator work, what their similarities are and what their difference are