@article{Bruzzi_1978,
	doi = {10.1088/0031-9120/13/4/007},
	url = {https://doi.org/10.1088/0031-9120/13/4/007},
	year = 1978,
	month = {may},
	publisher = {{IOP} Publishing},
	volume = {13},
	number = {4},
	pages = {239--240},
	author = {L Bruzzi},
	title = {A direct-reading inertial balance (teaching)},
	journal = {Physics Education},
	abstract = {The balance works on the same principle as that used by astronauts in space when weightless. It can be used as an educational device for demonstrating inertial mass and for providing a means of measuring it. The balance consists of two oscillators, weakly coupled. One supports the mass holder together with the coupling to the second, which is a flat metal spring. The position of the mass holder can be adjusted so that there is complete transfer of energy between the two oscillators.}
}