| Date | November 2012 | Marks available | 1 | Reference code | 12N.1.SL.TZ0.6 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 0 |
| Command term | Question number | 6 | Adapted from | N/A |
Question
A ball of mass m travels horizontally with speed v before colliding with a vertical wall. The ball rebounds at speed v in a direction opposite to its initial direction. What is the magnitude of the change in momentum of the ball?
A. 0
B. \(\frac{{mv}}{2}\)
C. mv
D. 2 mv
Markscheme
D
Examiners report
At SL more candidates thought that there was zero change in momentum (Response A) than the correct 2mv (Response D). This was a popular choice at HL too but the majority recognised this standard piece of bookwork.
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