Now that we have a simple animated projectile motion (previous tutorial) let’s try to add on the chart the three instantaneous speed vectors associated with the projectile. These speed vectors are: the horizontal speed, vertical speed and the total speed vector. The model works in all Excel versions but in 2007 it’s rather slow. [sociallocker][/sociallocker] Projectile Motion Tutorial #3 –… Read More... "2D Projectile Motion Tutorial #3"

## 2D Projectile Motion Tutorial #2

This part of the tutorial shows you how to animate the model created in the first part. Since it is addressed to beginners, this part of the tutorial will show you in detail how to create buttons and the associated macros for the input data interface and it will also show you how to animate the flight of the projectile and explain… Read More... "2D Projectile Motion Tutorial #2"

## Creating a Speedometer in Excel, Part #2 – tutorial

The previous tutorial (first half) explained how to download a speedometer picture from www.flickr.com and how to alter it (delete the needle) using a freeware called Gimp (similar to Photoshop). – The model replaces the deleted needle from the picture with a moving one created from a chart line. – This second half of the tutorial explains the geometry, trigonometry… Read More... "Creating a Speedometer in Excel, Part #2 – tutorial"

## Creating a Speedometer in Excel, Part #1 – tutorial

This is the first half of a tutorial which shows how to create a speedometer in Excel. The model is essentially a 2D scatter chart having as background the picture of a speedometer dial downloaded from www.flickr.com. Before using the photograph you need to erase the arm of the speedometer from the picture using Photoshop or other photo editing software. In the… Read More... "Creating a Speedometer in Excel, Part #1 – tutorial"

## A Family of Speedometers in Excel

Hi guys, by popular demand, this is a file containing five different animated speedometers and a tachometer (rpm-meter). I can recognize two models: a Toyota Camry and a Ford Crown Victoria. They work great. The rest I am not sure what they are, I would appreciate if you tell me. Just leave a comment. The model works in all versions of Excel. Cheers, George… Read More... "A Family of Speedometers in Excel"

## 2D Projectile Motion Tutorial #1

This part of the tutorial will show you how to create the simplest possible projectile motion model using standard kinematic formulas from the first year of high school. The variable parameters of the model will be: initial height, initial speed and initial angle and time step. “g” – the gravitational constant will be set at 9.81 m/s^2. This model is a… Read More... "2D Projectile Motion Tutorial #1"

## 2D Projectile Motion Model #1 – a virtual tactical shooting range

Hi Folks, As a kid was fascinated with high power rifles, sniper rifles, cannons and in general, fast projectiles. I’ve been brainwashed with all sorts of urban legends about how far an AK 47 or a pistol can shoot or how thick a steel metal plate a bullet can penetrate at various distances. I’ve also watched some documentary about snipers… Read More... "2D Projectile Motion Model #1 – a virtual tactical shooting range"

## Casual Introduction to Numerical Methods – a spring-mass-damper system model – part#3

Here is the third part of a tutorial in both elementary dynamics and numerical methods. It is written at a basic level and it shows you how to set up a dynamic model for numerical solving of simple differential equations. The dynamic model makes use of an infinite loop, which make the calculations advance in time. Instead of a large table… Read More... "Casual Introduction to Numerical Methods – a spring-mass-damper system model – part#3"

## Casual Introduction to Numerical Methods – a spring-mass-damper system model – part#2

Here is the second part of a tutorial in both elementary dynamics and numerical methods. It is written at a basic level and it shows you how to solve a system of difference equations in an Excel table. It also starts to explain how to animate the model. [sociallocker][/sociallocker] A casual approach to numerical modeling – the Spring-Mass-Damper System – part 2.… Read More... "Casual Introduction to Numerical Methods – a spring-mass-damper system model – part#2"

## Casual Introduction to Numerical Methods – a spring-mass-damper system model – part#1

Here is the first part of a casual tutorial in both elementary dynamics and numerical methods. It is written at a very basic level and it shows you how to solve a system of difference equations with a pencil and a paper and perhaps a pocket calculator to speed things up. A casual approach to numerical modeling – the Spring-Mass-Damper-System –… Read More... "Casual Introduction to Numerical Methods – a spring-mass-damper system model – part#1"

## Instant 3D-2D Perspective Mapping – the Navigator Functions – a convenient pair of user defined functions

This tutorial explains a pair of important user defined functions, the “Navigator_u()” and the “Navigator_v()”. These functions save the user nine columns of formulas by calculating the effects of: 3-dimensional shift, rotations around the three axes of coordinates and 3D-2D perspective mapping. These user defined functions are also easy to use compared to writing all the perspective mapping equations from… Read More... "Instant 3D-2D Perspective Mapping – the Navigator Functions – a convenient pair of user defined functions"