In physics the standard unit of weight is Newton, and the standard unit of mass is the kilogram. On Earth, a 1 kg object weighs 9.8 N, so to find the weight of an object in N simply multiply the mass by 9.8 N. Or, to find the mass in kg, divide the weight by 9.8 N.
Frequensey or hertz, I looked this up on the internet!
When sitting down there is gravity , when sat down the chair is pushing back at a equal but opposite force
