a person stands on a bathroom scale that rest on t
posted by bb .
a person stands on a bathroom scale that rest on the floor of an elevvator. when the elivetor is stationary the scale registers 50kg. when the lift acclelerates up ward the scle registers 60kg .taking g=10m/s^2, the best estimate acceleration of the lift is ;

m = 50 kg
weight = 50 * g
F = m a
f up from scale  m g = m a
60 * g  50 * g = 50 * a
10 g = 50 a
a = 0.2 g
if g = 9.91 m/s^2
then a = 1.96 m/s^2
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