A student is investigating the relationship between the extension of a polymer thread of unstretched length 2.000 m2.000\text{ m}2.000 m and the load hung on the thread. She has a set of 5 N5\text{ N}5 N weights.
Consider the readings shown in Table 5.1:
| Column 1 | Column 2 | Column 3 |
|---|---|---|
| 000 | 2.0002.0002.000 | 0.0000.0000.000 |
| 555 | 2.0152.0152.015 | 0.0150.0150.015 |
| 101010 | 2.0302.0302.030 | 0.0300.0300.030 |
| 151515 | 2.0452.0452.045 | 0.0450.0450.045 |
| 202020 | 2.0602.0602.060 | 0.0600.0600.060 |
Table 5.1
Identify the appropriate column headings, including units, for Column 1, Column 2, and Column 3.
The student repeats the experiment using a thread made of a different material to study how the material affects extension. State two variables that must be kept constant to ensure a fair test.
183 exam-style questions on CIE IGCSE Physics 1.5.1a Forces, resultant force and motion. Each one has a worked solution and a mark scheme showing where the marks go.