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This demonstration shows conservation of energy for a pendulum. When the pendulum is released, even though its path is interrupted, the pendulum still returns to its original height.
Setup:
Setup the system as shown in the image above.
Pull the pendulum back to a height corresponding to the 20 cm mark on the scale. Release the pendulum. It will swing and hit the bar, but the mass will continue to travel up to a height corresponding to the 20 cm mark.
Notes:
It is best to use these values as different heights and setups could lead to slack in the string.
Courses Used In:
PHY 10111
PHY 10310
PHY 10410
PHY 30210
Discussion and Polling Questions:
(before demo) Will a regular pendulum reach the same height as the start, a lower, or a higher height?
(before demo) Will the interrupted pendulum reach the same height as the start, a lower, or a higher height?
What does the energy look like throughout this motion?
Equipment Needed:
Klinger Mangetic Mechanics Kit
String
Large Nut
Webcam (optional)
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