"What is the mass in kg of a 3920N piano?" Which formula would this question use? F=ma or W=mg?

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02-09-2016
Physics

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"What is the mass in kg of a 3920N piano?" Which formula would this question use? F=ma or W=mg?

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ottermelons ottermelons · Answer 1 · 2016-09-02T03:55:29+02:00

ottermelons ottermelons

02-09-2016

W = mg, because you have the weight of the piano and if you just divide it by g that will give you the mass you need. The piano isn't accelerating right now in a way that you'd need to use F = ma.

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