Physics help asap?!?

Question

If a person weighs 71.8 kg where acceleration due to gravity is 9.79 m/s^2, what would be the difference in weight (in kilograms and in newtons) where the acceleration due to gravity is 9.82 m/s^2??

First right answer gets 5 stars!

Answer 1

If a person has mass m kg, they have a weight of mg Newtons

so, with g = 9.79, we have 71.8 x 9.79 = 702.922 N

and with g = 9.82, we have 71.8 x 9.82 = 705.076 N

Difference is 705.076 - 702.922 = 2.154 N

so, 2.15 N in context of the question.

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Answer 2

on a scale in kg

difference in kg = (71.8*9.82/9.79)-71.8 = 0.22 kg 

on a scale in N

difference in N = 0.22*9.805 = 2.16 N 

Answer 3

Difference in weight is

71.8kg * (9.82 - 9.79)m/s² = 2.15 N

There is no change in the mass -- still 71.8 kg.

Answer 4

Rule

F = mg