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Inertial Balance II

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screenshot of the scene

Author: s_noonan

Group: Technical

Filesize: 24.33 kB

Date added: 2013-02-02

Rating: 5.6

Downloads: 515

Views: 457

Comments: 2

Ratings: 2

Times favored: 0

Made with: Algodoo v2.0.2 Edu

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This scene measures the frequency of the vibrating block and then calculates the mass from m = k/(2*pi*frequency)^2. It then changes the spring constant to maintain a frequency of 2 Hz. This "balance" will work from 0.001 to 1000 kg.

The mass measurement is not affected by air buoyancy and the system will work in the absence of gravity.
Last edited at 2016/07/02 20:51:38 by s_noonan
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I was a little confused at first when I saw the frequency remain at 2 Hz after changing the mass. But then I remembered that you said you changed the spring constant so that F remains at 2Hz. Nice idea! Could that actually be done in the real world with a real spring? :s

BTW - I rated this one a 10 also.
Last edited at 2013/02/03 04:57:04 by Xray
Q: Could that actually be done in the real world with a real spring?
A: Maybe. It depends on what you consider a "real spring". Here are some ideas:

1. Use a standard air cylinder (with piston). Increasing the air pressure in the cylinder increases the "spring rate" of the air.
2. Use a compression spring. Insert a "screw" that has a half-circle thread profile, and a pitch equal to the compression spring winding pitch, into one end of the compression spring. This screw can then be rotated to adjust the spring rate (fewer active coils increases the spring rate).
3. Use opposing electromagnets. Increase the current to increase the spring rate.