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help with kilograms for earths surface

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Weight = mg
 
Where weight is in Newtons (N), m is the mass in kilograms = 10 kg, and g is the acceleration due to gravity = 9.8 meters/sec2
 
W = (10 kg)(9.8 m/sec/sec) = 98 N
 
Which is "about" 100 N.  Since the problem asks "about how much", the answer is c.