This is a general question regarding force (mass x acceleration). I understand 1N =1kg mass x 1 m per second sq) all this basically tells me is that the force is proportionally increased and decreased when i increased or decrease the mass or force or both. However my question that I have been wondering is why is the actual force of a newton what it is. I know 1 newton equals .225 pounds because .1020 kg of mass accelerated at 9.8 m/s sq equals a newton and I can easily convert the force of kg mass into pound force since 1kg mass= 1kg mass force at gravity on earth . So why is it .225 pounds of force per newton. Why not any other number? I know it would change the force proportionally to the force of accelerating any matter in the universe, but I am just wondering why it is that amount of force .225 for 1 newton. Is this just an "ACCEPTED CONSTANT" that doesn't change with no reason?
[Physics] Why is 1 newton meter=.225 lbs force
forcesnewtonian-gravityunit conversionweightwork
Best Answer
They're just different units of force. If you hold a one kilogram object in your hand, its weight is $1\ \mathrm{kg}\times9.8\ \mathrm{m/s^2} = 9.8\ \mathrm N$. If you choose to measure the weight of that object in imperial units, you will find that it weighs about $2.2\ \mathrm{lbs}$.
Therefore, $$9.8\ \mathrm N = 2.2\ \mathrm{lbs}$$ so $$ 1\ \mathrm N = \frac{2.2}{9.8}\ \mathrm{lbs} \approx 0.224\ \mathrm{lbs}$$
It's just like inches vs. centimeters – they are two different units for measuring length, and 1 inch equals 2.54 centimeters.