DP Physics (last assessment 2024)
Question 19M.3.SL.TZ2.4ai
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.SL.TZ2.4ai |
| Level | SL | Paper | 3 | Time zone | TZ2 |
| Command term | Define | Question number | ai | Adapted from | N/A |
ai.
[Maximum mark: 1]
19M.3.SL.TZ2.4ai
The speed of a spaceship is measured to be 0.50c by an observer at rest in the Earth’s reference frame.
(ai)
Define an inertial reference frame.
[1]
Markscheme
a coordinate system which is not accelerating/has constant velocity/Newtons 1st law applies ✔
OWTTE
Both “inertial” and “reference frame” need to be defined
Examiners report
In defining an inertial frame of reference far too many candidates started with the words ‘ a frame of reference that...... ’ instead of ‘a coordinate system that.....’
