Is it possible to calculate the weight of a person by only using his smartphone,

Question

Is it possible to calculate the weight of a person by only using his smartphone, some action he must perform (jump, rotate etc.) and some data like his height or age.

Current smartphones have the following sensors/instruments: G-Sensor Digital compass Proximity sensor Ambient light sensor GPS

In conjunction with the data those devices would provide could we somehow get the approx. weight of a person?

I was thinking of like asking the person to jump and then calculate the downward velocity but that is more indicative of the persons physical strength then weight...

Explanation / Answer

Attach a rope to a suitable part of the person's anatomy (*)

Spin them around in a circle Use the accelerometers to measure the anglular velocity and hence the outward force, use the inclinometers to measure the angle of the rope to the vertical.

Simple force diagram gives you the person's mass.

If the reader is in a country with too many lawyers - I didn't mean this!

the optimum number of lawyers may be a fraction less than 1. Large scale experiments (and a chainsaw) would be needed to verify this!

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