| Date | November 2021 | Marks available | 1 | Reference code | 21N.1.HL:.tz0.16 |
| Level | Higher Level | Paper | Paper 1 | Time zone | time zone 0 |
| Command term | Question number | 16 | Adapted from | N/A |
Question
The diagram shows someone performing a tuck dive. How does the angular velocity change when the diver moves from position 2 to position 3 in the diagram?
[Source: Courtesy Swim England.]
A. It decreases to change the moment of inertia.
B. It remains the same in order to conserve momentum.
C. It increases in order to conserve momentum.
D. It is not altered with a change in moment of inertia.
Markscheme
C
Examiners report
Candidates found this question challenging with a number incorrectly indicating that angular velocity decreases to change the moment of inertia (option A).
Syllabus sections
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19N.2.SL.tz0.7a:
Explain the concept of angular momentum when a figure skater spins on ice.
- 19M.1.SL.tz0.19: Why does a diver use the tuck position? A. To reduce spin by decreasing moment of...
- 22M.2.HL:.tz0.5b: The diagram shows a gymnast performing a piked...
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22M.2.SL.tz0.3b:
The diagram shows a gymnast performing a piked somersault.
[Source: www.gymdrills4profs.com.]
Explain the manipulation of the moment of inertia during the flight and landing phases.
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19N.2.HL:.tz0.7b:
The diagram shows a figure skater spinning on ice.
[Source: © David Darling, http://www.daviddarling.info/encyclopedia/A/angular_momentum.htm]
Explain the concept of angular momentum when a figure skater spins on ice.
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21N.2.HL:.tz0.8a:
The diagram shows a person performing a somersault dive from a 10 m platform.
Outline how they use the law of conservation of angular momentum to perform a somersault dive.
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21N.2.SL.tz0.6d:
The diagram shows a person performing a somersault dive from a 10 m platform.
Outline how they use the law of conservation of angular momentum to perform a somersault dive.
