How do you calculate a force of a object that is not accelerating

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To calculate the force exerted on an object that is not accelerating, such as pushing against a wall, one cannot derive a formula but can only measure the force directly. In cases like a book resting on a table, the force can be calculated based on known values like gravitational acceleration. When pushing against a wall, the force can be measured using a scale placed between the hands and the wall. The discussion emphasizes that while some forces can be calculated, others require direct measurement. Understanding these concepts is crucial for accurately assessing forces in different scenarios.
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I would like to know how to calculate the force of an object that is not accelerating, for example, If I were push on a wall, neither me or the wall would move because the net force would be zero, but how would I calculate the force if I am trying to put on the wall.(I do not want the net force)
 
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Welcome to PF.

Sometimes that type of force can be calculated (like the force between a book and a table on which it is sitting) and sometimes it can't. The force you described can't be calculated, only measured.
 
The force on a book on a table can be calculated because g (or G) was measured previously (historically).

If you push the wall by simply leaning on it, you can imagine replacing yourself by a leaning post of equal weight and calculate the horizontal component caused by gravity (the part touching the floor is a pivot point).
 
russ_watters said:
Welcome to PF.

Sometimes that type of force can be calculated (like the force between a book and a table on which it is sitting) and sometimes it can't. The force you described can't be calculated, only measured.

How can you measure it?
 
assuredlonewo said:
How can you measure it?
Place a scale between your hands and the wall.
 

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