Question

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 ;

Answer 1

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