- #1
Tomdoml
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Homework Statement
I've gone out and measured my changing weight in an elevator using a bathroom scale, taking measurements each second, with the elevator ascending 4 storeys. I am wondering if it is possible to work out the acceleration of the elevator from these results, and if so how they relate to Newton's 2st and 3rd law.
e.g.1 mass = 75kg
mass inside elevator = 81kg
e.g.2 mass = 75kg
mass inside elevator = 70kg
Homework Equations
F=ma
g=9.8
Those should break down to give these?
F = m * (g + a)
a = F / m – g
The Attempt at a Solution
e.g.1 a = (81 * 9.8)N / 75kg – 9.8ms-2
a = 0.784ms-2 Upwards
e.g.2 a = (70 * 9.8)N / 75kg – 9.8ms-2
a = -0.653ms-2 Upwards