Question 86400
Force is defined as mass times acceleration. And in SI units, mass is in units of kilograms and
a generally accepted figure for the force of gravity is 9.8 meters per second^2.
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In this problem, the total mass acting on the wire is 70 + 82 + 20 + 17 = 189 kilograms.
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Substituting this and the acceleration due to gravity into the Force equation results in:
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F = m*a = 189 * 9.8 = 1852.2 kg/m/sec^2 
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and since a Newton is equal to a kg/m/sec^2, the answer is
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1852.2 Newtons
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Hope this helps you to understand the relationship between mass (kilograms) and Force (Newtons).