Enquiry skills: error and results 1) The Bungee Jump Company tested the strength of a number of different bungee cords. Each. cord
was tested with a 75 kg test mass (to represent a bungee jumper), which was dropped from a 60 m
bridge over a river valley. All of the cords used were 20 m long.
Here are the results:
Extension (m)
Mean extension (m)
Thickness of cord
(mm)
30
60
90
120
150
Repeat 1
30
16
11
7
6
Repeat 2
32
14
10
8
7
Repeat 3
32
18
9
6
5
a) Calculate the mean extension for each thickness of cord and fill in the table.
b) Give 3 reasons why the company repeated the test 3 times:
i.
ii.
iii.
c) Explain how these results could be tested for reproducibility
2) Student A carried out a similar investigation in her classroom. They didn't have access to all the
same equipment as the Bungee Jump Company in question 1.