Exam-style question
Try this first
A freely falling object takes 4 seconds to hit the ground. Calculate the distance fallen using the acceleration due to gravity.
- A.40 m
- B.80 m
- C.60 m
- D.100 m
Model answer
What a good answer should say
- 80 m.
- the correct option
Explanation
Why this works
The correct answer is 80 m. This supports Calculate acceleration due to gravity from motion data.
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.
Common mistake
No common mistake is linked to this question yet.