Vertical Throw with Free Fall Simulation

This is a simulation done from scratch after attending a crash course on EJSS. It displays the velocity and acceleration vectors as an object is projected vertically upward with a uniform downward acceleration. The initial upward velocity can be altered using a slider. The graph of velocity is traced as the ball moves. http://physicslens.com/ejss/verticalthrow_Simulation.xhtml

Getting Tides Right

I was reading up on tides this morning as I have to relieve a colleague's IP2 class on forces, when I stumbled upon this video. It explains tides in a way that differs from most textbooks that clarified for me why the oceans bulge at both ends along the Moon-Earth line at the 2'30" mark onwards.

Stirling Engine

I bought a simple beta Stirling engine online at dx.com recently and it came in the mail today. It works well with a cup of hot water placed under it, although it might take a little push to get it started due to the initial static friction. However, once it starts spinning, the wheel goes on

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LEGO Pendulum Clock to Demonstrate Oscillation Concepts

This is the Pendulum Clock from the LEGO Education Simple and Powered Machines Set. It can be used to demonstrate the variation of period with length of pendulum and is a very good visual representation of the escapement mechanism. There are many other models that one can build using this set, including a weighing scale, elastic

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