Notesale: Turn your study into money

Document Preview

Extracts from the notes are below, to see the PDF you'll receive please use the links above

---

Unit 6 - Assignment 2 - P3 and M3
Spring Experiment method

Instructions
1
...
This includes a: clamp and stand; spring and 50g mass and five 100g
masses
...
Set up the apparatus as shown in the diagram
...
Record the length of the spring with no mass on it
...

4
...

5
...

6
...

7
...

8
...

9
...

10
...
Make sure the results table
includes the following measurements: Mass/Kg; weight/N; length/mm and extension/mm
...
To calculate the weight, use this formula “Weight = Mass * Gravitational pull (9
...

Weight = Mass * Gravitational pull (9
...
81 * 0 = 0
= 9
...
050 = 0
...
81 * 0
...
981
= 9
...
150 = 1
...
81 * 0
...
962
= 9
...
250 = 2
...
81 * 0
...
943
= 9
...
350 = 3
...
81 * 0
...
924
= 9
...
450 = 4
...
81 * 0
...
905
Results table
Mass (Kg)
0
0
...
100
0
...
200
0
...
300
0
...
400
0
...
500

Weight (N)
0
0
...
981
1
...
962
2
...
943
3
...
924
4
...
905

Length (mm)
20
25
40
60
80
100
120
140
160
180
200

Extension (mm)
0
5
20
40
60
80
100
120
140
160
180

To conclude, this graph shows that as you increase the weight of the mass on the spring, the spring
extension will increase; this is due to the positive correlation of the points on the graph
...
The plotted
point are on the line of best fit; this shows that the results are very accurate and there was very little
percentage error
...
of launches:
41 Unmanned and manned
12 Unmanned
74 Unmanned
Unknown

Website:
NASA Archives
NASA Archives
NASA Archives
Could not find the relevant
information
...
I also researched the number launches that were
manned or unmanned
...
I was cautious that I did not used websites such a Wikipedia, as
the information can be added or edited by anyone
...
e
...
I
then put the information in to the table above
...
nasa
...
html
http://www
...
gov/missions/index
...
VHcSJ8maDxQ

Unit 6 - Assignment 2 - P4 and D4
Possible errors in the spring extension experiment:
•

Parallax error – Parallax error is the change in the apparent position of an object when the
position of the observer changes
...

This will cause the extension to change, which may affect the results and cause them to be
inaccurate
...

Also use a pointer to help read the scale on the ruler
...


•

Faulty spring – If the spring is faulty, for example, if it has been stretched to a certain length
in which it cannot go back to its original form, the results would not be accurate
...
To reduce
the percentage error, compare the spring to other springs of the same type, size and
elasticity
...

Mass error – If the masses do not weigh their correct weight, for example, if a 50g mass
weighed 52
...

To reduce the percentage error, check that the masses weigh the same as marked (if not

•

•

•

•

•

•

•

very close)
...

Length error – If the markings on the ruler are not accurate, for example 1mm on the ruler
may actually be 1
...
To reduce the percentage error, compare the ruler to different rulers to ensure
the markings are accurate
...
81m/s-2
...
There is really no need to reduce this percentage
error, as it will not make a big difference
...
This may cause the extension to
change, which may affect the results and cause them to be inaccurate
...

Spring bouncing – After the mass was put on the spring, it is likely to bounce up and down
...
To
reduce this percentage error, make sure that before measuring the extension, that the
weight is not swinging or bouncing (or moving in anyway)
...
This may also apply if the diameter of the
spring was different, or the cross sectional area of the spring was different
...
If the spring is damages, use masses to compare the
extensions between the springs, so that there will be no significant change in results
...
This may affect the results and
cause them to be inaccurate
...
If the
spring is damages, use masses to compare the extensions between the springs, so that there
will be no significant change in results
...
05 * 100 = 5%

Mass:
Mass = 100g

Percentage error in mass (%) = (2/100) * 100% = 2%

Extension:
Percentage error in extension (80mm) (%) = (1/80) * 100 = 1
...
81ms-2 and is a constant
...
2 = 10
...
Only NASA can add or edit the
information given
...

This is efficient as most people in this day and age own a device which can access the
internet, e
...
laptops, phones and tablets
...
For example, maintenance, to collect
scientific research or to give out supplies (i
...
food, water, etc
...


Disadvantages:
•

There are some sources which are not accurate and do not give out the right information,
like Wikipedia and Yahoo answers; anyone can add or edit the information on them correct
or incorrect
...
The spring
experiment took less than an hour and researching the number of space launches took over
an hour
...


Spring experiment method:
Advantages:

•

•
•

The method was accurate and easy and straight forward to carry out, hence the results
being accurate
...
We had one method
to follow and we did not have to research anything
...


Disadvantages:
•
•

•

There are many errors which could possibly occur within this experiment e
...
parallax error,
which could affect the results and cause inaccuracy
...
We must also have the right
apparatus
...

May calculate values wrong; this could cause inaccuracy and a significant change to the
graph
...


Overall, the method for collecting data for the spring experiment was the most efficient, as it was
very straight forward and not time consuming
...

This shows that there was little inaccuracy when collecting the results

---