Question

A student stands on a bathroom scale in an elevator at rest on the 64 floor of a building. the scale reads 836n. as the elevator moves up the scale reads 935n. what is the acceleration of the elevator

Answer 1

at rest
mg=836 N
as g=9.8
m=836/9.8=85.30 kg
when going up,
mg+ma=935N
ma=935-836= 99N

a=99/85.30  = 1.16 m/s².
that is the acceleration of elevator
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