What is the Relationship Between Force and Weight?

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The discussion centers on the relationship between force and weight, highlighting a common confusion between mass and weight. The initial calculations attempted to relate force to weight using incorrect conversions, leading to incorrect results. It is emphasized that mass is measured in kilograms, while weight is a force measured in Newtons. The participant eventually resolved the misunderstanding and found the correct answer. This illustrates the importance of distinguishing between mass and weight in physics calculations.
Northern Cardinal
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Homework Statement
I need help figuring out c.

a) A 15.0-kg child is riding a playground merry-go-round that is rotating at 45.0 rpm. What centripetal force must she exert to stay on if she is 1.50 m from its center?
Correct answer: 499.649 N
b) What centripetal force does she need to stay on an amusement park merry-go-round that rotates at 3.00 rpm if she is 7.10 m from its center?
Correct answer: 10.511 N
c) Compare each force with her weight.
Relevant Equations
force from part (a) / weight = _______
force from part (b) / weight = _______
So here's what I've tried:

force from part (a) / weight = 499.649N / 15kg = 33.310
force from part (b) / weight = 10.511N / 15kg = 0.701

Apparently this wasn't correct. What am I doing wrong? I feel like I'm missing the obvious.
 
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Mass is stated in kg. That's not weight. Weight is a force in Newtons.
 
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Thanks! I was able to figure out the correct answer.
 
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Excellent!
 
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