How to Graph for TY or LC OL

7/30/2019 How to Graph for TY or LC OL

1/19

How to Graph Data

TY and LC OL Physics

Copyright Dee Magui re

CBS,

Kilkenny

For non-commercial purposesonly.. Enjoy!

Comments/suggestions please to the SLSS physics website forum

@

http://physics.slss.ie/forum
http://physics.slss.ie/forumhttp://physics.slss.ie/forum


2/19

Graphing data


3/19

Does yourgraph looklike thisone?

F

a

1.0 2.0 3.0 4.0 5.0 6.0 7.0

36.4

31.0

26.0

21.0

15.8

10.2

5.2

0

There areseveral

majorerrors inthis graph.

How manycan you

spot?


4/19

So, it may not be as simple as graphingthe exact data that is in the examquestion

..but there are a number ofguidelines to help you.


5/19

Lets have another quick look at thequestion


6/19

Now you are ready to draw the graphThere are a few easy things you can dostraight away:

(i) Ask for graph paper (deducted

marks otherwise!)(ii) Title the graph

(iii) Decide what data will go on each

axis

(iv) Title the axes (include units)


7/19

Graphing data

(i) Ask for graph paper (marks deducted

otherwise!)


8/19

Graphing data

(ii) Title the graph

You can find a very suitable one in the question


9/19

Graphing data

(iii) Decide what data will go on each axisAs a rule, their top line is your bottom line

So, F will go on the x axis. Dont forget

the units!


10/19

To verify Newtons second Law

F/N

So farthegraph

looks likethis..ongraphpaper..

naturally!

Since F ison the xaxis, lets

put a on theyaxis.dontforget

units!

a /cm s-2


11/19

Graphing data

The next stage is VERY IMPORTANTLets have another look at the data wenow want to plot.start with F


12/19

Graphing data

The values for F go from 1.0 up to 7.0...so that is straightforward enough

Use as much of your graph sheet as possible

but make sure you go at least as far as8.0ideally upto 10.0

You must make equal sized intervals along your x axis


13/19


F/N

0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0

a /cm s-2


14/19

Now decide on how your y axis will be divided.

The values for a go from 5.2 to 36.4..but you MUST

start at zero

You must go AT LEAST AS FAR as 36.4. Try to useas much of the page as possible, using EQUAL sizeddivisions

Do NOT write the above readings on yr graph!!!!!!!!!


15/19


F/N

0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0

45

40

35

30

25

20

15

10

5

a /cm s-2


16/19

You must NEVER..join-the-dots!

Always pick a best-fit line. If thedots dont form an EXACT straight line,make sure there is the same number of

dots on each side of the line


17/19


F/N

a /cm s-2

0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0

45

40

35

30

25

20

15

10

5


18/19

In summary. Do it on graph paper

Title the graph and the axesInclude units on the axes

Divide your axes correctly

And finally..

Plot your points

Their top line is your bottom line


19/19

If you make a mistake on yourdivision of axes etc, it is oftenquicker and neater to start again

.Ask for more graph paper

Documents

How to Graph for TY or LC OL