The normal force is equal to the weight of the body during deceleration. When the body is about fall, depends on the location of the body on the ground. The normal force is represented by FN and measured in terms of N (Newtons)
An object during rest on the flat surface the normal force FN is
FN = mg
Where,
g = Gravitational Force
m = mass is m
Given
A 2kg box sits on a 3kg box which sits on a 5kg box.
The 5kg box rests on a table top
Find out
We have to determine the normal force exerted by the 5kg box on the 3kg box
Solution
The mass above the 5kg box= Masses of the two boxes =2kg+3kg=5kg
Force exerted by these masses will be equal to the normal force that 5kg mass is exerting.
Therefore,
N=5×g
N=49N
Answer
The normal force exerted by the 5kg box on the 3kg box = 49N