An investigation is carried out to study the relationship between the extension of a metal wire of unstretched length 2.000 m2.000\text{ m}2.000 m and the load hung on the wire. The student has a set of 15 N15\text{ N}15 N weights.
Consider the readings shown in the table:
| Column 1 | Column 2 | Column 3 |
|---|---|---|
| 0 | 2.000 | 0.000 |
| 15 | 2.002 | 0.002 |
| 30 | 2.004 | 0.004 |
| 45 | 2.006 | 0.006 |
| 60 | 2.015 | 0.015 |
State the appropriate column headings, including units, for:
The student decides to repeat the experiment using a wire made of a different metal in order to study how the material affects the extension. To ensure a fair comparison, suggest two other variables that the student must keep constant.
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.