Question 1
A student whirls a 0.20 kg mass on a string in a horizontal circle of fixed radius and measures the tension for several speeds. Her graph of tension against speed squared is shown. What radius did she use?
Twenty marks of multiple choice across all four modules. Read every option before you choose: the wrong ones are built from common slips.
| Marks | 20 |
|---|---|
| Options | Four, one best answer |
| Our papers | Two timed 20-question Section I papers |
| Angle θ (°) | Force (N) |
|---|---|
| 0 | 0.000 |
| 30 | 0.061 |
| 45 | 0.084 |
| 60 | 0.140 |
| 90 | 0.121 |
About the share of the time its marks deserve: Section I is a fifth of the marks, so roughly 35 minutes of the 3 hours, less if you are quick.