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03 Newton - The Unit of Weight and Force
03 Newton - The Unit of Weight and Force
Published: 2011/09/08
Channel: elearnscience
What is a Newton?
What is a Newton?
Published: 2016/02/05
Channel: Christopher Rafalik
What is a Newton?
What is a Newton?
Published: 2014/10/28
Channel: Andrew Hartnett
HOW MUCH FORCE IS 1 NEWTON | (GREAT EXAMPLE + MAGIC)
HOW MUCH FORCE IS 1 NEWTON | (GREAT EXAMPLE + MAGIC)
Published: 2017/02/26
Channel: Badru Ironside
Newton (unit)
Newton (unit)
Published: 2014/07/18
Channel: Audiopedia
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Newton metre
Published: 2014/10/28
Channel: Audiopedia
Newton
Newton's Laws: Crash Course Physics #5
Published: 2016/04/28
Channel: CrashCourse
Newton (unit)
Newton (unit)
Published: 2016/01/29
Channel: WikiAudio
Spectrum Light Bar Installed on North Newton P.D. Unit.
Spectrum Light Bar Installed on North Newton P.D. Unit.
Published: 2012/07/21
Channel: 911outfittersllc
Feel the unit NEWTON.
Feel the unit NEWTON.
Published: 2016/03/22
Channel: Study Labs
Newton unit - Wiki Videos
Newton unit - Wiki Videos
Published: 2015/10/16
Channel: Wiki Videos
The Totem Display Unit from Newton Press Ltd
The Totem Display Unit from Newton Press Ltd
Published: 2017/09/19
Channel: Newton Press
a day in the life of newton unit :P
a day in the life of newton unit :P
Published: 2007/02/14
Channel: aliciatrotter
Jasper County Community Unit #1 School District   Newton, Illinois
Jasper County Community Unit #1 School District Newton, Illinois
Published: 2013/11/21
Channel: 11nrse
UNIT CONVERSION | Newton to Dyne | Chain-Link Method
UNIT CONVERSION | Newton to Dyne | Chain-Link Method
Published: 2017/04/29
Channel: Learn With SR
newton unit video three
newton unit video three
Published: 2009/02/23
Channel: skyrocketinvestments
Newton Memorial Hospital Newly Renovated Maternity Unit!
Newton Memorial Hospital Newly Renovated Maternity Unit!
Published: 2010/05/17
Channel: adingoatemy
280 Boylston Street, Newton - Unit 511
280 Boylston Street, Newton - Unit 511
Published: 2013/02/10
Channel: Mike Hughes
TOTALLY UNEXPECTED - CSX Seaboard System Sticker Unit #5461 Leading Q299 - Newton Falls OH Aug 2017
TOTALLY UNEXPECTED - CSX Seaboard System Sticker Unit #5461 Leading Q299 - Newton Falls OH Aug 2017
Published: 2017/08/14
Channel: Corner Field Hobby Railfan
BAD DRIVERS EPISODE #NEWTON
BAD DRIVERS EPISODE #NEWTON'S UNIT 1701 FAILS TO WAIT FOR PED. /
Published: 2017/10/05
Channel: Bad Drivers Of #YEG FALL EDITION
Physics - Unit 2 Newton
Physics - Unit 2 Newton's Laws Lesson on static and kinetic friction
Published: 2013/12/11
Channel: Mr Mc
Newton Medical Center (New MRI Unit)
Newton Medical Center (New MRI Unit)
Published: 2013/12/20
Channel: pmrvideos
Prof. Paul Boyle, International Unit Newton Fund Conference
Prof. Paul Boyle, International Unit Newton Fund Conference
Published: 2014/10/29
Channel: Universities UK International
79 Florence Street, Newton Unit 400S
79 Florence Street, Newton Unit 400S
Published: 2012/05/09
Channel: vishome0910
ASL 2 Unit 7 Video Test Newton South
ASL 2 Unit 7 Video Test Newton South
Published: 2017/10/20
Channel: Felix Flax
Unit 3 Dynamics Lesson 1 Newton
Unit 3 Dynamics Lesson 1 Newton's First Law Video
Published: 2017/10/25
Channel: Thomas Monteverde
Newton Laws / Th Old Nite - Zulrah guide - Stud Unit
Newton Laws / Th Old Nite - Zulrah guide - Stud Unit
Published: 2016/01/24
Channel: Leart Sejdiji
Calculus Unit 4.9 Notes Newton
Calculus Unit 4.9 Notes Newton's Method 2016
Published: 2016/01/28
Channel: Kevin Gentz
Calculus Unit 4.9 Notes Newton
Calculus Unit 4.9 Notes Newton's Method Day 2 2017
Published: 2017/01/20
Channel: Kevin Gentz
Newton Laws - Cerberus guide Stud Unit
Newton Laws - Cerberus guide Stud Unit
Published: 2015/09/14
Channel: Leart Sejdiji
264 E Newton Street Unit C Eastlake Seattle Rental
264 E Newton Street Unit C Eastlake Seattle Rental
Published: 2015/08/10
Channel: Andrew Perkins
SUNNY ONE BEDROOM UNIT, Cronulla. Newton Real Estate
SUNNY ONE BEDROOM UNIT, Cronulla. Newton Real Estate
Published: 2016/04/28
Channel: Newton Real Estate
Unit 04 - Newton
Unit 04 - Newton's Third Law
Published: 2013/11/06
Channel: Stephen Bornheimer
Unit 2 53 Newton Avenue, Bell Post Hill
Unit 2 53 Newton Avenue, Bell Post Hill
Published: 2014/11/21
Channel: Harcourts North Geelong
Newton
Newton's pilot unit
Published: 2011/12/07
Channel: mvassieu
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Newton's second law of motion | Forces and Newton's laws of motion | Physics | Khan Academy
Published: 2011/06/14
Channel: Khan Academy
250 Hammond Pond Pkwy, Unit 611n, Newton MA - Natalie Zurman - Tel 617-593-2170
250 Hammond Pond Pkwy, Unit 611n, Newton MA - Natalie Zurman - Tel 617-593-2170
Published: 2016/07/28
Channel: BostonREP
Basic Introduction to Newton
Basic Introduction to Newton's Second Laws Unit of Measurement
Published: 2017/01/09
Channel: WeSolveThem
2323 Washington St Unit 1-1, Newton MA 02462 - Condo - Real Estate - For Sale -
2323 Washington St Unit 1-1, Newton MA 02462 - Condo - Real Estate - For Sale -
Published: 2017/09/11
Channel: Move2Boston
15 Hammond Pond Parkway Unit 2 Newton MA | Chestnut Hill 02467
15 Hammond Pond Parkway Unit 2 Newton MA | Chestnut Hill 02467
Published: 2017/06/01
Channel: Dan Gorfinkle, Realtor
Unit 2 Newton
Unit 2 Newton's 2nd Law
Published: 2014/10/14
Channel: William Stafford
76 Cloverdale Road Unit 76, Newton MA 02461 - Condo - Real Estate - For Sale -
76 Cloverdale Road Unit 76, Newton MA 02461 - Condo - Real Estate - For Sale -
Published: 2017/03/15
Channel: Tracy Johnson
5608 Willoughby Newton Dr Unit 14 Centreville VA 20120 32517 48738 HD
5608 Willoughby Newton Dr Unit 14 Centreville VA 20120 32517 48738 HD
Published: 2016/02/05
Channel: Paul Gunning
IMPRESSIVE ONE BEDROOM UNIT, Cronulla. Newton Real Estate
IMPRESSIVE ONE BEDROOM UNIT, Cronulla. Newton Real Estate
Published: 2016/02/09
Channel: Newton Real Estate
Unit 2: Forces and Newton
Unit 2: Forces and Newton's First Law
Published: 2017/09/09
Channel: Riki Sorenson
4616 Newton AC Unit Delivery
4616 Newton AC Unit Delivery
Published: 2012/02/13
Channel: CBPropertiesMemphis
PhySci Unit 7e Newton
PhySci Unit 7e Newton's 2nd Law Problems Screencast
Published: 2013/07/23
Channel: Jonathan Ariail
ISE 2017: Outline Features Newton 88 Advanced Audio Processing Unit
ISE 2017: Outline Features Newton 88 Advanced Audio Processing Unit
Published: 2017/02/10
Channel: rAVe Publications
250 Hammond Pond Pkwy, Unit 112s, Newton MA   Natalie Zurman   Tel 617 593 2170
250 Hammond Pond Pkwy, Unit 112s, Newton MA Natalie Zurman Tel 617 593 2170
Published: 2016/07/28
Channel: BostonREP
The System Unit - GRP2EHS Newton
The System Unit - GRP2EHS Newton
Published: 2015/10/07
Channel: Jom Clavecillas
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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Newton
Unit system SI derived unit
Unit of Force
Symbol N 
Named after Sir Isaac Newton
Unit conversions
1 N in ... ... is equal to ...
   SI base units    1 kgms−2
   British Gravitational System    0.2248089 lbf

The newton (symbol: N) is the International System of Units (SI) derived unit of force. It is named after Isaac Newton in recognition of his work on classical mechanics, specifically Newton's second law of motion.

See below for the conversion factors.

Definition[edit]

One newton is the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in direction of the applied force.

In 1946, Conférence Générale des Poids et Mesures (CGPM) Resolution 2 standardized the unit of force in the MKS system of units to be the amount needed to accelerate 1 kilogram of mass at the rate of 1 metre per second squared. In 1948, the 9th CGPM Resolution 7 adopted the name newton for this force.[1] The MKS system then became the blueprint for today's SI system of units. The newton thus became the standard unit of force in the Système international d'unités (SI), or International System of Units.

This SI unit is named after Isaac Newton. As with every International System of Units (SI) unit named for a person, the first letter of its symbol is upper case (N). However, when an SI unit is spelled out in English, it should always begin with a lower case letter (newton)—except in a situation where any word in that position would be capitalized, such as at the beginning of a sentence or in material using title case. Note that "degree Celsius" conforms to this rule because the "d" is lowercase.— Based on The International System of Units, section 5.2.

Newton's second law of motion states that F = ma, where F is the force applied, m is the mass of the object receiving the force, and a is the acceleration of the object. The newton is therefore:[2]

F = m a
1 N = 1 kg m/s2

where the following symbols are used for the units: N for newton, kg for kilogram, m for metre, and s for second.

In dimensional analysis:

where is force, is mass, is length and is time.

Examples[edit]

At average gravity on Earth (conventionally, g = 9.80665 m/s2), a kilogram mass exerts a force of about 9.8 newtons. An average-sized apple exerts about one newton of force, which we measure as the apple's weight.[3]

1 N = 0.102 kg × 9.80665 m/s2    (0.102 kg = 102 g)

The weight of an average adult exerts a force of about 550 – 800 N.

566 N = 57.7 kg × 9.80665 m/s2 (where 57.7 kg is the average Asian adult mass)
791 N = 80.7 kg × 9.80665 m/s2 (where 80.7 kg is average North American adult mass)

Commonly seen as kilonewtons[edit]

It is common to see forces expressed in kilonewtons (kN) where 1 kN = 1000 N. For example, the tractive effort of a Class Y steam train locomotive and the thrust of an F100 fighter jet engine are both around 130 kN.

One kilonewton, 1 kN, is 102.0 kgf, or about 100 kg of load.

1 kN = 102 kg × 9.81 m/s2   

So for example, a platform that shows it is rated at 321 kilonewtons (72,000 lbf), will safely support a 32,100 kilograms (70,800 lb) load.

Specifications in kilonewtons are common in safety specifications for:

Conversion factors[edit]

Units of force
newton
(SI unit)
dyne kilogram-force,
kilopond
pound-force poundal
1 N ≡ 1 kg⋅m/s2 = 105 dyn ≈ 0.10197 kp ≈ 0.22481 lbf ≈ 7.2330 pdl
1 dyn = 10−5 N ≡ 1 g⋅cm/s2 ≈ 1.0197 × 10−6 kp ≈ 2.2481 × 10−6 lbf ≈ 7.2330 × 10−5 pdl
1 kp = 9.80665 N = 980665 dyn gn⋅(1 kg) ≈ 2.2046 lbf ≈ 70.932 pdl
1 lbf ≈ 4.448222 N ≈ 444822 dyn ≈ 0.45359 kp gn⋅(1 lb) ≈ 32.174 pdl
1 pdl ≈ 0.138255 N ≈ 13825 dyn ≈ 0.014098 kp ≈ 0.031081 lbf ≡ 1 lb⋅ft/s2
The value of gn as used in the official definition of the kilogram-force is used here for all gravitational units.
Three approaches to units of mass and force or weight[4][5]
Base Force Weight Mass
2nd law of motion m = F/a F = Wa/g F = ma
System BG GM EE M AE CGS MTS SI
Acceleration (a) ft/s2 m/s2 ft/s2 m/s2 ft/s2 gal m/s2 m/s2
Mass (m) slug hyl pound-mass kilogram pound gram tonne kilogram
Force (F),
weight (W)
pound kilopond pound-force kilopond poundal dyne sthène newton
Pressure (p) pound per square inch technical atmosphere pound-force per square inch atmosphere poundal per square foot barye pieze pascal
Standard prefixes for the SI units of measure
Multiples Prefix name deca hecto kilo mega giga tera peta exa zetta yotta
Prefix symbol da h k M G T P E Z Y
Factor 100 101 102 103 106 109 1012 1015 1018 1021 1024
 
Fractions Prefix name deci centi milli micro nano pico femto atto zepto yocto
Prefix symbol d c m μ n p f a z y
Factor 100 10−1 10−2 10−3 10−6 10−9 10−12 10−15 10−18 10−21 10−24

See also[edit]

Notes and references[edit]

  1. ^ International Bureau of Weights and Measures (1977), The international system of units (330–331) (3rd ed.), U.S. Dept. of Commerce, National Bureau of Standards, p. 17, ISBN 0745649742. 
  2. ^ "Table 3. Coherent derived units in the SI with special names and symbols". The International System of Units (SI). International Bureau of Weights and Measures. 2006. 
  3. ^ Whitbread BSc (Hons) MSc DipION, Daisy. "What weighs 100g?". Retrieved 28 August 2015. 
  4. ^ Comings, E. W. (1940). "English Engineering Units and Their Dimensions". Industrial & Engineering Chemistry. 32 (7): 984–987. doi:10.1021/ie50367a028. 
  5. ^ Klinkenberg, Adrian (1969). "The American Engineering System of Units and Its Dimensional Constant gc". Industrial & Engineering Chemistry. 61 (4): 53–59. doi:10.1021/ie50712a010. 

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