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Blog of Physics Teaching and Concept Ideas. Providing help in solving problems and creating demonstrations and labs. The goal is to help students visualize the physics and increase their understanding not only of physics class but also the workings of the natural world.
Wednesday, March 15, 2017
Collisions Between a Moving Particle and a Rigid Object
E.4.b.4 - Analyze a collision between a moving particle and a rigid object that can rotate about a fixed axis or about its center mass.
The main idea with these problems is that a particle comes in at a straight line and collides with another object that then results in rotation. Think of a ball of clay being thrown at a baseball bat being held out. The ball, moving in a straight line, hits the bat and causes the bat to rotate. The bat could either be fixed at some point that the new clay/bat system will rotate around or the bat could be unattached and free to move unrestricted and then the clay/bat system will rotate around its new center mass.
Below is a good video talking qualitatively about what happens when a linear moving particle collides with an object that is free to rotate
Next is a video that show the process of solving a collision problem between a moving particle and an object that is free to rotate
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