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A soap bubble is being blown by the wind - Edexcel - A-Level Physics - Question 6 - 2023 - Paper 1
Question 6
A soap bubble is being blown by the wind. The free-body force diagram shows the forces acting on the bubble. P is the force of the wind, W is the weight of the bubbl... show full transcript
Worked Solution & Example Answer:A soap bubble is being blown by the wind - Edexcel - A-Level Physics - Question 6 - 2023 - Paper 1
Step 1
Identify the forces acting on the bubble
Answer
In this scenario, we have three forces acting on the soap bubble:
- P: The force of the wind acting horizontally.
- W: The weight of the bubble acting vertically downward.
- U: The upthrust acting vertically upward.
The resulting force F on the bubble is determined by the vector addition of these forces.
Step 2
Determine the resultant force diagram
Answer
To find the resultant force F, we need to analyze how the forces interact:
- The upward force U counters part of the downward weight W. Hence, the effective weight acting downwards becomes W - U.
- The force P acts to the right as the wind blows the bubble.
This means the vector diagram for the resultant force should be such that:
- The horizontal component is P.
- The vertical component is W - U (pointing downward).
Among the given options, diagram B accurately represents this interplay of forces with the resultant force vector drawn appropriately.