Untitled

Physics Worksheet The first semester

By :

NUR

KHOLILAH ,S.Pd

SENIOR HIGH SCHOOL 1 GRESIK 2009

MANYAR

CHAPTER 1 QUANTITIES AND UNITS A. Standard of Competency 1. Apply the physics quantities concept and measurements B. Basic Competence 1.1 Measure the physical quantities (mass,lengt,time) I.1.1Physical quantities A.

Indicator

1. define the physical quantities and unit 2. compare the basic physical quantities and the derive physical quantities with it’s unit . 3. mention the names of instrument measure correctly . 4. mention the smallest scale of instrument measure . B.

Subject maters

Basic Quantities are the physical quantities the units of which are predetermined Derived quantities are the physical quantities which the units of which are derived from basic quantities /units -

Basic Quantities and Units

Quantities Units Symbol Length meter m Mass kilogram Kg Time second s Electric currant ampere A Temperature Kelvin K Luminous Intensity Candela Amount of substance Mole mol

Ca

-

Derived Quantities and Units

Quantities Units Symbol Area Square meter m2 Volume Cubic meter m3 Density Kilogram /cubic meter Kg/m3 Velocity Meter/second m/s Acceleration Meter/square second m/s2 The Instrument measure of physical quantities Length mass Ruler balance Vernier caliper Micrometer screw

Time Writs watches Spring balance Houss balance

clocks Stopwatch

The Smallest scale of instrument measure Name of instrument Smallest scale Ruler 1 mm Vernier caliper 0,1 mm Micrometer screw 0,01 mm Spring Balance 1 gram Balance 1 ons Writs watches 1 minutes

tudent Work Sheet QUANTITY AND UNITS Standard competition measure .

: 1. apply the

concept physical quantity and it’s

Based competition time)

: 1.1 measure the physical quantity (length, mass, and

Objectives of study

: student can use instrument measure of length , mass , and time with several kind of instrument measure .

activity

: 1. mention the names of instrument measure you know ! 2. classify that instruments measure to this table appropriate with the quantity .

Names of instrument measure No Quantity of length Quantity of mass Quantity of time 1. 2. 3. 4. 5. 6. 7. 3. mention the smallest scale of instrument measure

No 1 2 3 4 2 2 3 3 2

Quantity Length

Mass

1

Time

1

Name of instrument 1

Smallest scale

Evaluation 1. Mention the physical quantities and the smallest scale to completed this table . Instrument The Physical Question measured Ruler Balance Vernier caliper Clocks Spring balance Micrometer screw Stopwatch

Smallest scale

I.1.2 Measurement A. a. b. c. d.

Indicator To be able read scale of micrometer screw and vernier caliper Can to report the result of measurement Identification the significant numbers To be able use the rule of significant

B. -

Subject maters The method to read scale of vernier caliper

Look at figure, please ! -1. Look at the Zero of vernier scale à The reading of the main scale that coincides with the zero vernier scale Is between 2.4 and 2.5 cm - 2 Look at the vernier scala that 0.062 cm

joint vertically with the main scale à from figure is

thus, the reading -

of the vernier caliper is 2.4 + 0.062

= 2.462

The method to read scale of micrometer screw

Look the figure! 1. The reading of the main scale that coincides with the edge of the outer wrap is between 3.5 and 4.5 2. 2The outer wrap line which coincides exactly with the horizontal line of the main scale is the 6-th line Thus, the reading

of the micrometer screw is 3.5 mm

+ 0.06 mm = 3.56 mm

-

THE METHOD OF REPORTING

-

The report the result of single measurement as follow :

-

THE RESULT OF MEASUREMEN

X = Xo ∆ X X = physical quantities measured Xo = result of the single measurement ∆ X = measurement uncertainty To report the result of recurrent measurement as follow : X = ∆X = The mean of Physical quantity value of X =

∆X = Significant Numbers • Significant Numbers are all numbers that are gained from the result of measurement. For Example :The Result of length measurement is : 4,5 cm ( Has 2 Significant Numbers ) 2,16 mm ( Has 3 Significant Numbers ) 41,25 ( Has 4 Significant Numbers ) • The Rules of significant numbers 1. All numbers other than zero are significant number. Example: 3752.8 (has 5 significant numbers) 2. The zero number between two numbers other than zero is significant number. Example: 5.002 Kg (has 4 significant numbers) 3. The zero number on the right of numbers other than zero is not a significant number, except if there is a sign like an underline. Example: 8760 m (has 3 significant numbers) 4. The zero number on the left hand of numbers other than zero is not significant number. Example: 0.82 A (has 2 significant numbers) • The Rules to calculate Significant Numbers 1. The result of addition or subtraction of significant numbers can only have one estimation number . Example: + 2. The result of multiplication or division of significant numbers can only have significant numbers as many as the smallest significant number between the

numbers multiplied. Example:

Student Work Sheet MEASURMENT I. Purpose a. to be able read scale of micrometer screw gauge and vernier caliper b. to be able use the rule of significant numbers II. Instrument and materials a. coin b. vernier caliper c. micrometer screw gauge d. ruler III. Activity step’s 1. 2. 3. 4. 5.

measure measure measure measure measure

the the the the the

thickness of coin by using ruler thickness of coin by using vernier caliper thickness of coin by using micrometer screw gauge diameter of coin by using ruler diameter of coin by using verniert caliper

IV.

Observation data

Table 1 No Measurement equipments The thickness of coin measurement Significant numbers 1 2 3 Ruler Fernier caliper Micrometer screw

Table II No Measurement equipment Diameter of coin measurement Significant numbers 1 2 Fernier caliper Micrometer screw gauge V.

How to report the result of

How to report the result of

Evaluation

1. from table 1 observe the significant number with the minimum significant number in measurement equipment 2. From three of measurement equipments according to you, which one is most rigorous? 3. The rigorous of measurement equipment prescribed by what? 4. from table 1 and 2 , calculate : a. circumference circle (by using the rule of significant numbers)

b.

c.

the area of circle (by using the rule of significant numbers)

thickness + diameter (by using the rule of significant)

Home work Subject Name

: Physics : …….

Class Date

: …… :……

Answer Question correctly ! 1.

Determine the reading of the verniaer caliper in

the figure below :

2.

Determine the reading of the micrometer screw in

the figure below :

0

1

2

10

5

3. Measurement Instrument Diameter of coin The thickness of coin Ruler 2 cm 3 mm Vernier caliper 2,1 cm 2,8 mm Micrometer screw 2,16 cm 2,67 mm

numbers)

From the table calculate :

A. -

Circumference circle …..

-

….

(by using the rules of significant

-

…..

B. -

The area of circle …..

-

….

-

….

C.

1.1.3

MEASUREMENT UNCERTAINTY

A. 1. 2. 3. 4.

Indicator Identification the measurement uncertainty Explain about absolute uncertainty Determine relative uncertainty Compare the solute uncertainty and relative uncertainty

B.

Subject maters Absolute uncertainty and relative uncertainty

-

Data resulting from a single measurement is usually reported by : X = Xo ∆ X Absolute uncertainty Either in measurement : ∆ X is called absolute uncertainty The value of ∆ X can be determined as follow : ∆ X = ½ Smallest scale

Absolute uncertainty (∆X) can be used to determine the precision of the measurement. Relative uncertainty The value of relative uncertainty can be determined as follow : Relative uncertainty = - Relative uncertainty can be used to determine the acucracy of the Measurement

STUDENT WORK SHEET MEASUREMENT UNCERTAINTY I . Purpose

: a. can discriminate absolute uncertainty and relative

uncertainty b. can calculate relative uncertainty c. can identification accurate and accuracy measurement II . Observation data : Table 1 Complete! No

Instrument to measure Thick metal (mm) Method to report result measurement Sum of significant number Absolute uncertainty Relative uncertainty Note

1 2 3

Ruler

Fernier caliper Micrometer screw

2

1,9 1,89 1,9 1,89

2

0,5 0,020 0,0100

1

2 3 Table 2

Complete! No

Instrument Diameter metal (mm) Method to report result measurement Sum of significant number Absolute uncertainty Relative uncertainty Note 1 fernier caliper 23,3 23,3

0,020

3

2 Micrometer screw 23,25 23,25

,0,01

4

CONCLUSION

C.

Evaluation

1. a. …….

The raiding of the micrometer scew above can be reported as …

b.

Determine the Absolute uncertainty and relative uncertainty!

2. a .The raiding of the vernier

caliper above can be reported as ……….

b.Determine the Absolute uncertainty and relative

uncertainty !

3. From the result of measurement above ( 1 and 2 ),which one of measurement the more precision

C. Basic Competence 1.2. Making table and graph Indicators 1. To make the table of basic experiments result 2. To observe the table from experiments result 3. To make the graphic of based the table. 4. To understand and explain the graphic.

Subject Maters To make the table : - attention quantity is measuremend,value,unit and variable. To make the graphic : - attention variable two is connet No 1 2 3

Y liter 2 4 6

1 2 3

X (kg) ……. ……. …….

From the table: - You can draw the graphic

X-Y follow:

Conclusions the graph is : Y Proportional to X -You can draw The graphic

X- Z

bellow :

Conclusions the graph is : Y constant to X

Student Worksheet “Making table and graph

”

I.

Objective: to make table and graphs

II. 1. 2. 3. 4.

Devices and Material Measure glass Glass Water Balance

III. Working Procedures 1. Measure the glass mass (mi =…….) 2. Measure the water volume with Measure glass (V=……) and put the water into the glass and than measure mass (mf =…..) 3. Determine the water mass with m= ( mf - mi ) 4. Repeat the steps (2-3) above 3 times with the different water volume. 5. Make the table to represent the experiment result in( No,v,m, ) 6.

From data as shown in table draw

a

m-v

graph

7.

From data as shown in table draw

a

CONCLUSION

Evaluation The Result of experiment bellow : No

(Y)

1 2 3

3 6 9

(X) 0,5 1 1,5

The basid table : a. Complet the colom of table b. Draw the graphic Y-X

c.

Explan

the meaning

of graph

-v

graph

d.

Draw the graphic

e.

Explan

X-Z

the meaning

of graph