Your 'energy conversion 1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** Your optional message or comment: **
** How far and through what angle did the block displace on a single trial, with rubber band tension equal to the weight of two dominoes? **
.5cm, 1 degree
This is how far the block moved and how much it rotated when released and allowed to slide along the pice of paper.
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of two dominoes: **
.5cm, 1 degree
.75cm, 1.25 degrees
1cm, 1.5 degrees
1cm, 1.5 degrees
1.2cm, 1.5 degrees
This is how far the block moved when it was released and the rubber band went back to having slack in it which stopped the block from moving across the paper.
** Rubber band lengths resulting in 5 cm, 10 cm and 15 cm slides: **
7, 13, 16
On the third one i think that the rubber band exceeded its 30% restriction on the streach.
These numbers tell me how far the rubber band had to be streached to slide the distances of 5cm, 10cm, and 15cm across the paper.
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of four dominoes: **
2cm, 6
3.5cm, 8
7cm, 9
9cm, 13
12cm, 14
These are the distances and the degrees of rotations that the block made while sliding along the paper on the table top.
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of six dominoes: **
7cm, 10
9cm, 13
10.5cm, 14
14cm, 13
14.5cm, 15
This is how far the block went across the paper when using the tension observed when the rubber band was supporting 6 dominoes.
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of eight dominoes: **
7, 10
10, 12
14, 15
17, 19
18.5, 20
This is how far and how many degrees of rotation the block went when using the tension observered when the rubber band was supporting 8 dominoes.
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of ten dominoes: **
12, 10
15, 13
15.5, 14
17, 16
20, 19
This is how far and how many degrees of rotation the block went when using the tension ovserved when the rubber band was supporting 10 dominoes.
** Rubber band length, the number of dominoes supported at this length, the mean and the standard deviation of the sliding distance in cm, and the energy associated with the stretch, for each set of 5 trials: **
.89,.2702
6.7,4.056
11,3.221
13.3,4.791
15.9,2.924
I chose Joules. My results were obtained by using the data program to find there mean and standard deviation. The energy associated with each streach was obtained by measuring how far the rubber band streached and then how far the block moved across the paper on the table top.
** Slope and vertical intercept of straight-line approximation to sliding distance vs. energy, units of slope and vertical intercept, description of the graph and closeness to line, any indication of curvature: **
6,11
newton cm
My data points are not very close together but they seem to form a slightly straight line with a little bit of curvature to them. The curvature seems to be slightly upward concavity.
** Lengths of first and second rubber band for (first-band) tensions supporting 2, 4, 6, 8 and 10 dominoes: **
6,11
newton cm
My data points are not close together but they seem to form a curved line. The curvature to the line seems to have some upward concavity to it.
** Mean sliding distance and std dev for each set of 5 trials, using 2 rubber bands in series: **
6,11
7.5,11.75
8.25,13
9,15
9.75,15.5
** Slope and vertical intercept of straight-line approximation to sliding distance vs. energy, units of slope and vertical intercept, description of the graph and closeness to line, any indication of curvature: **
8.1,1.443
** 1-band sliding distance and 2-band sliding distance for each tension: **
.5,9
7,12
10,13
15,14
12,16
** Slope and vertical intercept of straight-line approximation to 2-band sliding distance vs. 1-band sliding distance, units of slope and vertical intercept, description of the graph and closeness to line, any indication of curvature: **
10,14
newton cm
My data points are not close together but they seem form a curved line. There is curvature to my graph and it appears to have upward concavity to it.
** Discussion of two hypotheses: 1. The sliding distance is directly proportional to the amount of energy required to stretch the rubber band. 2. If two rubber bands are used the sliding distance is determined by the total amount of energy required to stretch them. **
This experiment supports my orginal hypotheses.
** How long did it take you to complete this experiment? **
2 hours
** Optional additional comments and/or questions: **
Your work on this experiment looks good overall.