1-5 Practical extension of a spring

• Natuurkunde
• Middelbare school
• vwo
• Leerjaar 3

PRACTICAL - What is the

relation between the force 

on and extension of a spring

(p. 40)

Bluetooth 

- ON

- VPN off

Stationary

- Writingbook

- Pen, pencil

- Calculator

- iPad

Mark

- YES

Lessonup

- YES

Schoolbags in

the cupboard

Phones in the phonebag

Lessongoals:

1. How do you write a scientific report.
2. Investigate the relation between the force on a spring and the extension of a spring.

How to write a scientific report

Cover page has: A titel, names of groupmembers (and surnames), class, date, and the name of teacher

1. Introduction
2. Theory
3. Method
4. Results of measurement
5. Calculations
6. Conclusion and recommendations

General remarks

• Dont make spelling errors.
• Write headings, use bold, cursive, underline and colour only if it makes things clearer. 
• Write formulas in their own line, and number the formulas. Symbols must be in cursive. Use an equation editor to make formulas. 
• Dont use 'I' and 'me' in your report. Write in the third person.
• Give numbers to the foto's, figures and tables for clarity.
• Make your report in word, and tables and graphs in excell (or other)
• Save as a PDF and hand in in google glassroom

Introduction

Explain what you are going to do and why..

And dont say 'because the teacher says so'. 

Theory

• Good to make this before you do the practical.
  
• Explain all the theory relevant to this practical. This counts the most, so it must be saturated.
  

Measuring method

Answer the questions:

• How and with what did you make the measurements.
• Write a paragraph explaining everything that you did.

Also insert some foto's of your practical (make them at the start of your practical that you dont forget) and also explain what is on the photo's.

Results of measurement

Here you write the results that you have collected in a clear structure.

It is useful to write your data in a table, which you can make in excell (then you can easilly convert it to a graph)

Dont write your calculations here. Calculations you present under its own heading.

Calculations

Show your calculations here. 

If graphs and tables are needed, make these in excell or another spreadsheet.

Conclusion and recommendation

• This is where you interpret the data and calculations.
  
• Explain what it means and if it is correct (usually you can pick up when something is not right).
  
• Explain why it is correct or why not, and also if a value is an outlier explain what went wrong.
  
• Write what you could have done better.
  

Extension:

Zero position:

Number of cm with which the spring expands.

Length at the start of the practical with no mass pieces hanging on the spring.

You may use 100 gram equals 1 N in this practical

Directly proportional

If the force is twice as large 

the extention is also twice 

as large.

If the force is three times as large, the extention is also three times as large.

Skill 7 (back of textbook)

1. Draw a set of axes.
2. Each axis gets a magnitude and unit.
3. Calibrate the axis correctly (steps of 2, 4, 5, 10 or a multiple of these.
4. Plot the data as points in the axes.
5. Draw a straight line through the points if they lie more or less on the same line.

Now make the practical

Work in pairs.

Reports must be handed in 

in one weeks time.

It is for a mark (1T)