To what extent does the bow angle affect the drag force it experiences while moving through water, if boat mass (0.07kg), fluid density(1000kgm^-3 at 25C) and applied force(N) are kept constant?SL
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A
Official IB Result
IB Grade: A
Criteria A: Focus and Method
4/6
0
3
6
Criteria StrandsPro
A.1Topic clarity and communication
Good
A.2Research question formulation and focus
Moderate
A.3Methodology appropriateness and completeness
Poor
Criteria Feedback
- The student communicates a relevant physics investigation with a clear practical context and a recognizable purpose.
- The student's topic stays centered on hydrodynamic resistance and they show some awareness of the factors that can affect boat motion.
- The student includes a workable experimental outline with repeated trials, diagrams, and an attempt to control variables.
- The investigation does not keep the driving force constant across all trials, which weakens the comparison.
- Some important variables that affect drag, such as wetted area and displaced volume, are not controlled well enough.
- The method is only partly aligned with the research question, so the experiment does not isolate bow angle cleanly.
Criteria B: Knowledge and Understanding
4/6
0
3
6
Criteria StrandsPro
B.1Subject knowledge application
Moderate
B.2Use of terminology and concepts
Moderate
Criteria Feedback
- The student uses relevant physics language such as pressure drag, wave-making resistance, tension, and Reynolds number appropriately in several places.
- The student shows a broad awareness of the fluid-mechanics ideas connected to boat resistance.
- The student's work generally demonstrates that they understand the topic rather than only naming terms.
- Some key equations and force relationships are applied incorrectly, especially in the treatment of the moving mass and tension.
- The student sometimes uses notation inconsistently, including treating different angles as if they were the same physical quantity.
- A few explanations mix together forces on the boat and forces on the hanging mass, which reduces conceptual accuracy.
Criteria C: Critical Thinking
12/12
0
6
12
Criteria StrandsPro
C.1Research analysis and evaluation
Poor
C.2Discussion and argument development
Poor
C.3Critical evaluation
Poor
Criteria Feedback
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- Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
- Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
Criteria D: Presentation
4/4
0
2
4
Criteria StrandsPro
D.1Structure and formatting
Good
D.2Layout and visual elements
Good
Criteria Feedback
- Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
- Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
- Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.