tag:techtv.mit.edu,:Array/185419180 2008-03-05 11:36:14 -0500 MLK Celebration 2009 <p>Announcement relevant to this celebration, singing of the Black National Anthem and a closing benediction by Rev. Amy McCreath of the MIT Board of Chaplains.</p><p>Read more about the event <a href="http://web.mit.edu/newsoffice/2008/mlk-main-0226.html" target="_blank">here</a>. </p> 532 tag:techtv.mit.edu,:Array/185376420 2008-10-10 14:24:44 -0400 MIT Department of Physics Technical Services Group Two carts are connected together on an air track with a spring. Under bright lights you can see the coupled oscillation of the carts back and forth, but under black lights you can see that the center of mass moves at a constant velocity. 103 tag:techtv.mit.edu,:Array/185354180 2009-06-03 15:26:02 -0400 MIT Department of Physics Technical Services Group Odd-shaped objects with their centers of mass marked by orange paint are thrown. While the objects appear to follow very wobbly trajectories when viewed under bright lights, under black lights you can see that their centers of mass travel in smooth parabolas. <br><br> Then center of mass is not necessarily in the center of an object, as demonstrated by the last object in the video (a weighted disk). 91 tag:techtv.mit.edu,:Array/185324620 2009-06-10 14:04:53 -0400 MIT Department of Physics Technical Services Group Two pucks of the same mass are slid at each other on an air table, and their resulting collisions demonstrate conservation of momentum. Notice on the first collision, for example, that when a moving puck hits a stationary puck dead-on, that the second puck leaves with the same velocity as the first, and the first puck stops moving completely. 80