A spring scale A and a lever scale $B$ having equal lever arms are fastened to the roof of an elevator, and identical

packages are attached to the scales as shown. When the elevator moves downward with an acceleration of $2\mathrm{.}500\frac{m}{s^2}$

the spring scale indicates a load of $66$ N $.$ Assume $g=9\mathrm{.}81\frac{m}{s^2}.$

Problem $12\mathrm{.}004.$b $-$ Changes in spring scale and lever scale when elevator moves upwards

Determine the load indicated by the spring scale and the mass needed to balance the lever scale when the elevator moves upward

with an acceleration of $2\mathrm{.}500\frac{m}{s^2}.$

The load indicated by the spring scale is

N$.$

The mass needed to balance the lever scale is