3A40.10 - SHM and Rotational Motion - Spring and Mass

Code Number:
Demo Title:
SHM and Rotational Motion - Spring and Mass
Comparison of SHM and Rotational Motion
Area of Study:
Von Weise Motor with 10" plate and attached pin, Spring, 3 kg mass on holder.

Place the masses on the spring.  Set the motor in place so that the center of the plate is in line with the bottom of the masses.  Turn the power supply up to that the motor and plate turn at the same rate as the spring motion.  Practice will be needed to start the spring in phase with the rotating plate.  The pinpoint light source is used to create a shadow graph of this on the screen in the lecture room.

  • Jim Hicks, "Bridging Activities: Concrete to Abstract", TPT, Vol. 51, # 4, April 2013, p. 252.
  • J. Casey,  "The Bobbing Buoy",  TPT, Vol. 26, # 1, p. 33, January 1988.
  • Miles Padgett, "A New Twist on the Doppler Shift", Physics Today, Feb. 2014, p. 58.
  • Borislaw Bilash II, David Maiullo, "Simple Harmonic Motion - It's Easy as Pi", A Demo a Day: A Year of Physics Demonstrations, p. 170.
  • M- 892:  "Circle of Reference",  DICK and RAE Physics Demo Notebook.
  • M- 876:  "Mass & Spring-Big Strip Record",  DICK and RAE Physics Demo Notebook.

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