tag:techtv.mit.edu,:Array/219572160 2007-05-17 09:03:01 -0400 Walter Lewin Videos <p>Video demonstrates impact time courtesy Dr. Peter Dourmashkin, MIT</p><p>Demo 17 from Physics I: Classical Mechanics, Fall 1999</p><p>Full class available on </p><p><a href="http://ocw.mit.edu/OcwWeb/Physics/8-01Physics-IFall1999/CourseHome/" target="_blank">http://ocw.mit.edu/OcwWeb/Physics/8-01Physics-IFall1999/CourseHome/</a></p><p>as of May 2007 <br /></p><p> </p> 125 tag:techtv.mit.edu,:Array/219551280 2008-06-16 00:59:38 -0400 wrenow MIT Physics demonstration bernoulli's principle: A ping pong ball can be balanced on an air stream from a blower<br /><br />http://en.wikipedia.org/wiki/Bernoulli%27s_Principle<br />http://ocw.mit.edu/OcwWeb/Physics/8-01Physics-IFall1999/VideoLectures/detail/Video-Segment-Index-for-L-28.htm 91 tag:techtv.mit.edu,:Array/219530320 2008-09-02 10:20:19 -0400 MIT Department of Physics Technical Services Group <p>A stuffed monkey is suspended from a rod at one end of a lecture hall by an electromagnet. A golf ball gun aimed directly at the monkey cuts power to the electromagnet when fired. Thus, the monkey begins falling at the same instant the gun fires the golf ball. The projectile and target meet in mid air.</p><p>Intuitively one might think that the ball will go over the monkey's head due to its fast speed. However, gravity accelerates all objects downward at the same rate, meaning the monkey and the ball will meet at exactly the same point. If the ball was shot even faster, it would still hit the monkey, but higher above the ground. </p><p>No animals were harmed in this demo. </p> 77 tag:techtv.mit.edu,:Array/219502960 2008-08-28 14:21:12 -0400 MIT Department of Physics Technical Services Group <p>A wooden ball is attached to the rim of a spinning wheel. The ball is held in place by a string. When the spring is cut, the ball flies in a straight tangent to the wheel.</p><p>In the camera's frame of reference, the ball constantly accelerates around in a circle due to the centripetal force pulling it inwards. When the string is cut, the acceleration stops, and the ball flies away in a straight tangential line. When the string is cut in the rotating frame of reference, a ficticious force (centrifugal force) accelerates the ball. </p> 79 tag:techtv.mit.edu,:Array/219476980 2008-04-12 18:00:48 -0400 CPW '08 Videos Do you know what hundreds of bouncy balls falling from the sky looks like? You don't? Really? Well. We can fix that. 41 tag:techtv.mit.edu,:Array/219436040 2008-06-19 01:35:36 -0400 wrenow increasing the density of water w/ salt<br />floating a golf ball<br /><br />MIT Physics 8.01L 2007 58 tag:techtv.mit.edu,:Array/219409020 2008-09-02 15:54:18 -0400 MIT Department of Physics Technical Services Group A ball is dropped in front of a meter stick and lit by a strobe light. A long exposure photograph captures the position of the ball at each evenly spaced flash of light. The acceleration of the ball can then be measured from the photo. <br><br> Note that the frame rate of the video capture (30fps) is quite close to the strobe rate (15Hz). This is why the strobe flashes in the slow motion video don't appear to be exactly evenly timed. <br><br> See the <a href="http://www.flickr.com/photos/physicsdemos/3174207211">final image</a> on Flickr. 42 tag:techtv.mit.edu,:Array/219389960 2007-12-28 09:52:51 -0500 Doc Edgerton Films See what happens when a ball bearing is dropped on a few Christmas ornaments in this slow motion film by Doc Edgerton. 37 tag:techtv.mit.edu,:Array/219369120 2007-12-07 16:32:22 -0500 Doc Edgerton Films Watch what happens when you drop a golf ball in a bucket of water in this slow motion film by Doc Edgerton. 16 tag:techtv.mit.edu,:Array/219346680 2007-06-13 13:18:26 -0400 Doc Edgerton Films <p>Rubber Ball bounced on floor</p><p>black and white </p> 13