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Questions and Answers
Which instrument has the finest scale for more precise measurement?
Which velocity-time graph represents an object reaching terminal velocity?
Why is Instrument C more suitable for accurate length measurements?
Which graph shows an unrealistic representation of an object falling through air?
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How is terminal velocity reached according to the correct graph?
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Study Notes
Measuring Length and Motion
Measuring Length
- Instrument A has a scale with markings every 1 cm, indicating that it can measure length with an accuracy of 1 cm.
- Instrument B has a scale with markings every 1 cm, similar to Instrument A.
- Instrument C has a scale with markings every 0.5 cm, indicating that it can measure length with an accuracy of 0.5 cm.
- Instrument D has a scale with markings every 0.1 cm, indicating that it can measure length with an accuracy of 0.1 cm.
- Instrument D would give the most accurate reading due to its scale markings every 0.1 cm.
Motion and Velocity-Time Graphs
- An object falls freely through air and reaches terminal velocity before it touches the ground.
- The velocity-time graph of the object shows an initial increase in velocity, followed by a constant velocity.
- The correct velocity-time graph shows a curved line that eventually becomes horizontal, indicating terminal velocity.
- Graph A shows an initial increase in velocity, followed by a constant velocity, making it the correct graph.
- The other graphs (B, C, and D) do not show the correct velocity-time relationship for an object reaching terminal velocity.
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Description
This quiz is for BGCSE Physics students, covering topics such as measurement of length and velocity. It includes multiple-choice questions to test understanding of these concepts.
