## Free-Body Diagrams in Two-Body Motion

Students are often confused about the forces in drawing free-body diagrams, especially so when they have to consider the different parts of multiple bodies in motion. Two-Body Motion Let’s consider the case of a two-body problem, where, a force F is applied… Continue Reading

## Collision Simulation

I created this post here to bookmark some useful tools for use during my upcoming JC1 lectures on Dynamics. This is a simulation for collisions that show the momenta before and after collisions. It requires registration after one visit. A… Continue Reading

## Two Body Problems in Dynamics

Problems involving two bodies moving together usually involve asking for the magnitude of the force between the two. For example: A 1.0 kg and a 2.0 kg box are touching each other. A 12 N horizontal force is applied to… Continue Reading

## Falling with Parachute

The following simulation allows users to observe the effect of air resistance on a parachutist before and after he opens his parachute. Try to open the parachute when the man first reaches terminal velocity and observe the changes in velocity.

## Box on a Slope Simulation

This simulation allows students to observe the variation of the normal contact force N acting on a box placed on a frictionless slope with the angle of inclination of the slope changing. It also allows them to see how the… Continue Reading

## Man in Elevator Simulation

In this simulation, students can observe the variation of the normal contact force (N) and its effect on acceleration and velocity as an elevator moves upward. Questions for students to work on can include: Express the acceleration as a function of… Continue Reading

## Newton’s 2nd Law Experiment using Motion Sensor

For my students: To download the file and video for analysis using Tracker, right-click the file here… To verify the equation F = ma, where F is the resultant force on an object, m is the mass of the object… Continue Reading

## Elevator Physics

In a recent IP3 class on Newton’s 2nd Law, the students were presented the “Elevator Problem” based on the THINK Cycle approach – a version of inquiry-based learning that was started in Temasek Junior College, Singapore. The “Elevator Problem” is a physics… Continue Reading

## 3 Common Dynamics Mistakes

After going through the topic of Dynamics in the A-level syllabus recently, it strikes me that there are several common mistakes or misconceptions that students whom I have taught over the years have always struggled with. I shall lay them… Continue Reading