tag:techtv.mit.edu,:Array/186219060 2007-05-15 15:13:19 -0400 Walter Lewin Videos <p>Demo 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 </p><p> </p> 228 tag:techtv.mit.edu,:Array/186144280 2007-05-16 14:59:16 -0400 Walter Lewin Videos <p>Demo 20 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> 206 tag:techtv.mit.edu,:Array/186077400 2007-05-16 15:25:51 -0400 Walter Lewin Videos <p>Demo 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> 144 tag:techtv.mit.edu,:Array/186036640 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/186000580 2008-08-27 16:48:12 -0400 MIT Department of Physics Technical Services Group <p>A bicycle wheel is suspended from one of end of its axie by a rope, and spun up by hand. The wheel's axle is then placed horizontally and the free end of the axle processes about the supported end. </p><p>The gyroscope seems to defy gravity because the torque created by the spinning wheel counteracts the torque due to gravity. Read more about gyroscopes <a href="http://en.wikipedia.org/wiki/Gyroscope">here</a>. Gyroscopes have been used through history for varied uses such as stabilizing spacecraft or for guidance systems on ships and missiles.</p> 89 tag:techtv.mit.edu,:Array/185950580 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/185913960 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/185867360 2007-05-17 09:12:27 -0400 Walter Lewin Videos <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> 68 tag:techtv.mit.edu,:Array/185838160 2008-09-09 14:53:31 -0400 MIT Department of Physics Technical Services Group A can of spray paint is attached to a spring oscillator. A roll of paper is run past the oscillating can. The result is a <a href="http://en.wikipedia.org/wiki/Sine_wave">sine wave</a> on the paper. 51 tag:techtv.mit.edu,:Array/185792320 2008-08-28 11:45:13 -0400 MIT Department of Physics Technical Services Group <p>A string carrying two weights is hung over a low friction bearing mounted pulley. The weights have slightly different masses, causing a uniform acceleration. When the time it takes the weights to move 1 meter is timed, we can calculate the acceleration of the system due to gravity. Because of the low amount of friction in the system, this value is very close to the theoretical value.</p><p>Read more about the <a href="http://en.wikipedia.org/wiki/Atwood_machine">Atwood Machine</a>. </p> 46