How do you calculate force needed to pull apart an object?

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To calculate the force needed to pull apart an object, such as a chin strap from a helmet, one can refer to the international standard which specifies a force of 25 Newtons for industry helmets. A special scale, known as a force gauge or dynamometer, can be used to measure this force accurately. Newton is the standard unit of force in the International System of Units (SI). Understanding these basic principles can help in practical applications outside of academic settings. Accurate measurement is crucial for safety and compliance in helmet design.
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I am trying to figure out how to calculate the force it takes to pull a chin strap from a helmet. Is there a special scale that you can use? I am not in school anymore and it has been years since I have done any math or science, so small words are greatly appreciated.
 
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According the international standard the force to pull the chin strap of an industry helmet is 25 Newton.
Newton is the unit for the force in the International System of measure.
 

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