The newton (symbol: N) is the SI derived unit of force, named after Isaac Newton in recognition of his work on classical mechanics.
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The newton is the unit of force derived in the SI system; it is equal to the amount of force required to accelerate a mass of one kilogram at a rate of one metre per second per second. In dimensional analysis, F=ma, multiplying m (kg) by a (m/s^{2}), the dimension for 1 newton unit is therefore:^{[1]}
Kilonewtons are often used for stating safety holding values of fasteners, anchors and more in the building industry.^{[2]} They are also often used in the specifications for rock climbing equipment. The safe working loads in both tension and shear measurements can be stated in kN (kilonewtons).
1 kN equals 101.97162 kilograms of load, but multiplying the kN value by 100 (i.e. using a slightly pessimistic and easier to calculate value) is a good rule of thumb.^{[3]}
newton (SI unit) 
dyne  kilogramforce, kilopond 
poundforce  poundal  

1 N  ≡ 1 kg·m/s²  = 10^{5} dyn  ≈ 0.10197 kp  ≈ 0.22481 lb_{f}  ≈ 7.2330 pdl 
1 dyn  = 10^{−5} N  ≡ 1 g·cm/s²  ≈ 1.0197×10^{−6} kp  ≈ 2.2481×10^{−6} lb_{f}  ≈ 7.2330×10^{−5} pdl 
1 kp  = 9.80665 N  = 980665 dyn  ≡ g_{n}·(1 kg)  ≈ 2.2046 lb_{f}  ≈ 70.932 pdl 
1 lb_{f}  ≈ 4.448222 N  ≈ 444822 dyn  ≈ 0.45359 kp  ≡ g_{n}·(1 lb)  ≈ 32.174 pdl 
1 pdl  ≈ 0.138255 N  ≈ 13825 dyn  ≈ 0.014098 kp  ≈ 0.031081 lb_{f}  ≡ 1 lb·ft/s² 
The value of g_{n} as used in the official definition of the kilogramforce is used here for all gravitational units. 
System  Gravitational  Engineering  Absolute  

Force (F)  F = m·a  F = m·a/g_{c} = w·a/g  F = m·a  
Weight (w)  w = m·g  w = m·g/g_{c} ≈ m  w = m·g  
Units  English  Metric  English  Metric  English  Metric 
Acceleration (a)  ft/s^{2}  m/s^{2}  ft/s^{2}  m/s^{2}  ft/s^{2}  m/s^{2} 
Mass (m)  slug  hyl  poundmass  kilogram  pound  kilogram 
Force (F)  pound  kilopond  poundforce  kilopond  poundal  newton 

The newton (symbol: N) is the SI unit of force. It is named after Sir Isaac Newton because of his work on classical mechanics. A newton is how much force is required to make a mass of one kilogram go faster at a rate of one metre per second.
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