MEASUREMENTAncient people uses;• objects such as ropes, stones and sticks

to measure other objects.• body parts such as the arms, hands and

feet• cubit – is the distance from the elbow to

the tip of the middle finger• palm – is the width of the person’s four

fingers• uncia – is the width of the thumb

• yard - is distance from the tip of the person’s nose to the tip of the middle finger

• king’s foot - as the standard of unit of measure for buying and selling and it is true till the king ruled.

Other units used in the Philippines;

1. dangkal or dama - width of the palm2. Dali - breadth of the finger3. Talampakan - length of foot4. Timuro - length of forefinger5. Hakbang - a single stride 6. Dakot - handful7. gusi-a jar - container for liquid such as tuba8. Kaing - a container used to r the amount of harvested fruits

Measurement is the process of obtaining the magnitude of

a quantity, such as length or mass, relative to a unit of measurement, such as a meter or a kilogram.

Accuracy is how close a measured value is to the

actual (true) value.

Precision is how close the measured values

are to each other.

Low AccuracyHigh Precision

High AccuracyLow Precision

High AccuracyHigh Precision

Examples of Precision and Accuracy:

Scalar Quantities Vector Quantities

Length: 4 mTime: 9 s

Speed: 20 km/hWork: 150 Nm

Density: 1 g/cm2

Velocity: 20 m/s, NorthAcceleration: 9.8 m/s2,

downwardForce: 10 N, Northeast

Displacement: 5 m, toward the door

Electric Field: N/C, toward the page

Table: Scalar vs. Vector

Fundamental DerivedMass: 6.5 g

Temperature: 273 KLength: 2.54 cm

Luminous Intensity: 0.1 candela

Time: 1 hour

Volume: 6 cm3

Density: 1000 kg/m3

Speed: 20 m/sPower: 100 J/s

Momentum: 5 kgm/s

Table: Fundamental vs. Derived

Scalar Quantities are quantities that have magnitude only; they are independent of direction.

Vector Quantities have both magnitude and

direction. The length of a vector represents magnitude. The arrow shows direction.

SI derived unit The International System of Units (SI)

specifies a set of seven base units from which all other units of measurement are formed.

Fundamental unit

is a set of units for physical quantities from which every other unit can be generated.

In the language of measurement, quantities are quantifiable

aspects of the world, such as time, distance, velocity, mass, momentum, energy, and weight, and units are used to describe their measure.

THANKS

For

Listening

By; Dodz