Question

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Kenna has a mass of 30 kilograms. What’s her weight in newtons? Assume that acceleration due to gravity is 9.8 N/kg.


Kenna weighs __________ newtons.

Answer 1

Given:
m = 30 kg, mass
g = 9.8 N/kg, acceleratin due to gravity.

By definition, the force (or weight) due to a mass of 30 kg is
W = mg = (30 kg)*(9.8 N/kg) = 294 N

Answer:  294 N

Answer 2

Given,

Mass of Kena = 30 kg

Acceleration due to gravity, g = 9.8 N/kg

The weight of Kena in Newtons will be = Mass of Kena X Acceleration due to gravity

     = 30 kg X 9.8 N/kg

     = 294 N

Therefore the Mass of Kena in Newtons = 294 N

The mass of a person or an object varies from planet to planet where the acceleration due to gravity varies.