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Glossary of Lecture Notes 2 2

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Newton's First Law
Law of Inertia - object at rest remains at rest and object in motion stays in motion unless acted upon by a force
Newton's Second Law
Force = Mass x Acceleration
Newton's Third Law
For every action force, there is an equal and opposite reaction force
Newton major units
MKS metric
kilogram x meters/s^2
Newton basic units
MKS metric
kg m/s^2
Dyne major units
CGS metric
gram x centimeter/s^2
Dyne basic units
CGS metric
g cm/s^2
Pound major units
English
lb x 32feet/s^2
Pound basic units
English
lb 32ft/s^2
Newtons in a pound
4.4
Joule major units
MKS metric
Newton x meter
Joule basic units
MKS metric
kg m^2/s^2
Erg major units
CGS metric
Dyne x centimeter
Erg basic units
CGS metric
g cm^2/s^2
Footpound basic units
English
ftlb/1
Ergs in a joule
10,000,000
joules in a ftlb
1.34
acceleration of earth English
32 ft/s^2
acceleration of earth metric
9.8 m/s^2
Watt major units
MKS metric
joule/second
Watt basic units
MKS metric
kg m^2/s^3
Ergsecond major units
CGS metric
erg/second
Ergsecond basic units
CGS metric
g cm^2/s^3
Horsepower major units
English
550ft x lb/second
horsepower basic units
English
550lb ft^2/s^3
Ergseconds in a watt
10,000,000
Watts in a horsepower
746

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