This is a 3D physics collision lab by MrSpoelstra
It uses THREE.js to display a "vacuum cleaner track" like those found in a well-equipped physics classroom. In the menu (top right) you can place different "carts" on the track and then give one of them a push. The cards on each cart interrupt a beam of light and you can measure the passing speed each time. You can measure the distances with the measuring tape (front right on the table). There are TWO conservation laws that the carts must satisfy in a collision: the law of conservation of momentum (Huygens) and the law of conservation of (kinetic) energy (Leibnitz). By looking carefully, measuring and using a calculator you can check whether these laws are also correct here. Despite the fact that this is a simulation, you still have to deal with measurement uncertainty and deviations due to sometimes non-ideal technology.
By holding your pointer above objects you can find out more information. You can put multiple carts on the track, but then an accurate time measurement quickly becomes impossible.
This lab tries to simulate the "look and feel" of experimenting for those who may not have those things at hand. Have fun experimenting with the "vacuum cleaner" or "blower" track!
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