DP Physics (last assessment 2024)
Question 19M.3.SL.TZ2.6bi
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.SL.TZ2.6bi |
| Level | SL | Paper | 3 | Time zone | TZ2 |
| Command term | Calculate | Question number | bi | Adapted from | N/A |
bi.
[Maximum mark: 1]
19M.3.SL.TZ2.6bi
A train of proper length 85 m moves with speed 0.60c relative to a stationary observer on a platform.
(bi)
In the reference frame of the train a ball travels with speed 0.50c from the back to the front of the train, as the train passes the platform. Calculate the time taken for the ball to reach the front of the train in the reference frame of the train.
[1]
Markscheme
Examiners report
Because there were three frames of reference in this question many candidates struggled to find the simple value for the time of the ball’s travel down the train in the train’s frame of reference.
