Astandard bathroom scale is placed on an elevator. a 25 kg boy enters the elevator on the first floor and steps on the scale. what will the scale read (in newtons) when the elevator begins to accelerate upward at 0.4 m/s2? express your answer in newtons.

F = 255 N

Explanation:

It is given that,

Mass of the boy, m = 25 kg

Acceleration of the elevator,

The elevator is accelerating in upward direction. The net force acting on the boy is given by :

g is the acceleration due to gravity

F = 255 N

The scale reading is 255 N as it begins to accelerate upward. hence, this is the required solution.