Exam-style question
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What assumption is made when using the freefall method to determine g?.
- A.Air resistance is negligible.
- B.The object must be a sphere.
- C.The height must be at least 50 meters.
- D.The object must be dropped from rest.
Model answer
What a good answer should say
- Air resistance is negligible..
- the correct option
Explanation
Why this works
The correct answer is Air resistance is negligible.. This supports Required practical 3: determine g by a freefall method.
in Motion along a straight line because it uses the required mechanics relationship directly. The other options are less suitable because they confuse a different force, motion, energy, momentum, or materials concept.
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