Work done Work done by a force is the product of the forces and the distance moved in the direction of the force. SI unit: joule (J) – the SI unit of energy. 1 J = 1 N m Work done must be calculated by using the component of the force that is parallel to … Read more Work, Energy and Power

# Coulomb’s Law

Coulomb’s force is the electrical force between two charges. Since there are positive and negative charges, coulomb’s force can be attractive or repulsive. However, the magnitude of the force produced by a point charge is similar to gravitational force: is the permittivity of free space. It is a description of how well electric field lines … Read more Coulomb’s Law

# Energy of a Simple Harmonic Oscillator

Energy changes in according to displacement The kinetic energy of a simple harmonic oscillator is In a SHM, the oscillator’s kinetic energy and potential energy always changes from maximum to zero throughout the oscillations. However, at all time, the total energy of the oscillator is constant. This value can be obtained by calculating the maximum … Read more Energy of a Simple Harmonic Oscillator

# Uniform Gravitational Force

Uniform gravitational force The gravitational force acting on a mass is called weight. Weight always acts vertically down and its magnitude is directly proportional to the mass. where g is the gravitational field strength on the Earth’s surface. Gravitational field strength of a point is the gravitational force acting on a unit mass at that point. … Read more Uniform Gravitational Force

# Centripetal acceleration

For an object moving in a uniform circular motion, the centripetal acceleration is Since , It is important to note that this centripetal acceleration is not angular acceleration. Angular acceleration is used in a rotational body while what we are doing here involves an object moving in a circle. A body of mass m would experience … Read more Centripetal acceleration

# Configure SFTP using ForkLift to InMotionHosting Reseller Account

In this post, I am going to list the steps required to set up SFTP connection to InMotionHosting Reseller account. I am using a Mac with ForkLift. If you are using Windows, a different FTP client or a different Hosting provider, some instructions may be different. These steps are also applicable to the InMotionHosting Shared … Read more Configure SFTP using ForkLift to InMotionHosting Reseller Account

# The Physics of Simple Harmonic Motion

An object moving in an SHM must obey the relation where is the displacement and is the angular frequency of the oscillator. is related to the frequency of the oscillator by the relation . A body is moving in SHM if its acceleration is directly proportional to the displacement and in the opposite direction to … Read more The Physics of Simple Harmonic Motion

# Simple Harmonic Motion and Circular Motion

Simple harmonic motion is closely related to a uniform circular motion. A real life simple harmonic motion. Review Question 1 Answer the following questions as you watch the first YouTube video(Simple harmonic motion and uniform circular motion). How does the centre of the red cylinder and the green ball relate? At which part of the SHM(left) … Read more Simple Harmonic Motion and Circular Motion

# Typing Equations on WordPress

Many teachers have asked me how I manage to put up those beautiful equations onto my posts. In this article, I will explain how I use LaTex to create those equations in my posts. LaTex LaTex is a system that scientists used to write their scientific journals. LaTex is huge. According to the LaTex organisation , … Read more Typing Equations on WordPress

# Mathematics of Circular Motion

Angular Displacement The angle which an object moves around a circle is called the angular displacement. This angle is usually expressed in radians. Hence, there are radians in one complete circle. The relationship between the angle in radian and the circle is where is the angular displacement in radians, and is the radius of the … Read more Mathematics of Circular Motion