measurement

MEASUREMENT

A comparison between a thing of unknown value and a thing of known

value.

thing of unknown value - the quantity to be

measured

the thing of known value - the measuring

instrument - standard- universally -accepted- consistent

Types of Quantities

1. Fundamental or

Basic Quantities2. Derived Quantities

The Fundamental or Basic Quantities

- Also called the undefinables

- Form the basis or foundation for the derived quantities

Length- The length of a thing is the distance between its

ends

Mass- Quantifies the amount of

matter in the body

Time- A dimension in which events occur in a sequence, quantifies the duration of events and the

intervals between them.

The Systems of Measurement/Units

The Systems of Measurement/Units

1. English

The Systems of Measurement/Units

1. English2. Metric

The Systems of Measurement/Units

1. English2. Metric

a) centimeter-gram-second (cgs)

The Systems of Measurement/Units

1. English2. Metric

a) centimeter-gram-second (cgs)b) meter-kilogram-second (mks)

The Systems of Measurement/Units

1. English2. Metric

a) centimeter-gram-second (cgs)b) meter-kilogram-second (mks)

3. International System of Units (SI)

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length inch, foot, yard, mile

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length inch, foot, yard, mile

centimeter

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length inch, foot, yard, mile

centimeter meter

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length inch, foot, yard, mile

centimeter meter meter (m)

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length inch, foot, yard, mile

centimeter meter meter (m)

mass

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length inch, foot, yard, mile

centimeter meter meter (m)

mass ounce, pound

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length inch, foot, yard, mile

centimeter meter meter (m)

mass ounce, pound gram

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length inch, foot, yard, mile

centimeter meter meter (m)

mass ounce, pound gram kilogram

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length inch, foot, yard, mile

centimeter meter meter (m)

mass ounce, pound gram kilogram kilogram (kg)

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length inch, foot, yard, mile

centimeter meter meter (m)

mass ounce, pound gram kilogram kilogram (kg)

time

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length inch, foot, yard, mile

centimeter meter meter (m)

mass ounce, pound gram kilogram kilogram (kg)

time second, minute, hour

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length inch, foot, yard, mile

centimeter meter meter (m)

mass ounce, pound gram kilogram kilogram (kg)

time second, minute, hour

second

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length inch, foot, yard, mile

centimeter meter meter (m)

mass ounce, pound gram kilogram kilogram (kg)

time second, minute, hour

second second

Table of Units for the Fundamental Quantities

Fundamental Quantity

System of Measurement/Units

English Metric SI

cgs mks

length inch, foot, yard, mile

centimeter meter meter (m)

mass ounce, pound gram kilogram kilogram (kg)

time second, minute, hour

second second second (s)

• All measurement systems have standards.

• All measurement systems have standards.

• Standards are exact quantities that everyone agrees to use as a basis of comparison.

The Derived Quantities

- Combination of two or more fundamental quantities

- Defined in terms of fundamental

quantities

Area

Area= (length)2

Area= (length)2

m2

Volume

Volume= (length)3

Volume= (length)3

m3

Density

Density

mass

volume

Density

kg m3

mass

volume

Speed/Velocity

Speed/Velocity

distance

time

Speed/Velocity

m s

distance

time

Acceleration

Acceleration

velocity

time

Acceleration

m s2

velocity

time

Weight

Weight= (mass)(gravitational

acceleration)

Weight= (mass)(gravitational

acceleration)

= newton (N)

ms2

kg ·

Weight= (mass)(gravitational

acceleration)

N

= newton (N)

ms2

kg ·

Force

Force= (mass)(acceleration)

Force= (mass)(acceleration)

= newton (N)

ms2

kg ·

Force= (mass)(acceleration)

N

= newton (N)

ms2

kg ·

Work/Energy/Heat

Work/Energy/Heat= (force)(distance)

Work/Energy/Heat= (force)(distance)

N·m = joule (J)

Work/Energy/Heat= (force)(distance)

J

N·m = joule (J)

Power

Power

work

time

Power

Js

work

time

= watt (W)

Power

Js

work

time

= watt (W)

W

Pressure

Pressure

force

area

Pressure

m2

force

area

= pascal (Pa)

N

Pressure

m2

force

area

= pascal (Pa)

N

Pa

The measure with which you measure

will be used to measure you.

- matthew 7:2