Jesse E. answered • 01/17/20
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Weight is the force of gravity on an object. Therefore the equation for this is:
F = ma
with a = 9.8 m/s2
To determine the weight of a 70 kg person, we substitute in the values:
Weight = F = 70 kg x 9.8 m/s2 = 686 kg(m)/s2
The unit kg(m)/s2 is also known as a Newton. So the person's weight would be 686 N.
Jesse E.
Here is a video for these concepts. https://www.khanacademy.org/science/physics/centripetal-force-and-gravitation/gravity-newtonian/v/mass-and-weight-clarification01/17/20