DP Physics (last assessment 2024)
Question 18N.3.SL.TZ0.c.ii
| Date | November 2018 | Marks available | [Maximum mark: 1] | Reference code | 18N.3.SL.TZ0.c.ii |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Estimate | Question number | c.ii | Adapted from | N/A |
c.ii.
[Maximum mark: 1]
18N.3.SL.TZ0.c.ii
The spacetime diagram shows the axes of an inertial reference frame S and the axes of a second inertial reference frame S′ that moves relative to S with speed 0.745c. When clocks in both frames show zero the origins of the two frames coincide.
A rod at rest in frame S has proper length 1.0 m. At t = 0 the left-hand end of the rod is at x = 0 and the right-hand end is at x = 1.0 m.
Using the spacetime diagram, estimate, in m, the length of this rod in the S′ frame.
[1]
Markscheme
0.7 m ✔
