A student investigates the extension of a silicone strap when masses are suspended from it.
Identify the three additional items of apparatus from the list below that the student must use to carry out this investigation (assume they already have the silicone strap and the masses):
The table below shows the student's results:
| Mass in g\text{g}g | Force in N\text{N}N | Extension in mm\text{mm}mm |
|---|---|---|
| 000 | 000 | 0.00.00.0 |
| 150150150 | 1.51.51.5 | 2.02.02.0 |
| 300300300 | 3.03.03.0 | 5.05.05.0 |
| 450450450 | Missing | 9.59.59.5 |
| 600600600 | 6.06.06.0 | 15.515.515.5 |
| 750750750 | 7.57.57.5 | 23.023.023.0 |
State the value of the missing force in the table.
Describe how the extension of the silicone strap changes as the force increases.
Explain whether the silicone strap obeys Hooke's Law.