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7Px 26 Hui-Tanguru 20137Px 26 Hui-Tanguru 2013What we will do What we will learnPreliminaries and roll The importance of starting well
Write down the KEY thing we need to do to pass this Achievement Standard
The one thing that might mess us up, even if we get everything else right
Use our new technique on the teeter plank How to implement the technique
Learn how to find uncertainties in the transformed variable
How to deal with uncertainties when transforming graphs
Two ways to find the uncertainty in the slope of a number
Two possible ways of finding the uncertainty in the slopeWhy Mr H prefers one over the other
Watch Mr H use the HDEF on the preliminary question
Another way of tackling the questions in the book
Set some new HW and a new due date PLUS have some HRT, if time.
How to influence our workstreamHow to make good use of time.
7 Physics Homework MarkingNo. of marks
What for
1 Having sketches and FULL working
1 Neat presentation and down-page format
1 Answer underlined and units given
1 Self marked and all correct – eventually
1 In on time and signed for (“This is my own work”…….)
Total A mark out of five that will contribute to the “homework” grade in the reports
HW item Skills practiced Prac: Unit 1Due pd 1, Thurs 21 Feb 13
Measurement and data
mass (kg) d (m)0.5 1.6420.6 1.450.7 1.370.8 1.1530.9 1.025
1 0.9291.5 0.58
2 0.434
0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.20
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
d (m)
mass (kg) d (m) @@@ log m log d
0.5 1.642@@@-
0.3010299960.21537315
3
0.6 1.45@@@ -0.221848750.16136800
2
0.7 1.37@@@ -0.154901960.13672056
7
0.8 1.153@@@-
0.0969100130.06182930
7
0.9 1.025@@@-
0.0457574910.01072386
5
1 0.929@@@ 0 -0.03198429
1.5 0.58@@@ 0.176091259 -0.23657201
2 0.434@@@ 0.301029996 -0.36251027
-0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
log d
-0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
f(x) = − 0.995759278969084 x − 0.0483653335437484
log d
1/m (kg^-1) d (m)2 1.642
1.6666667 1.451.4285714 1.37
1.25 1.1531.1111111 1.025
1 0.9290.6666667 0.58
0.5 0.434
0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.20
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
f(x) = 0.884336659785032 x
d (m)
