Exam-style question
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A stone is thrown vertically upwards with an initial velocity of 20 m/s. Calculate the time taken to reach the maximum height using the acceleration due to gravity.
- A.2 s
- B.3 s
- C.4 s
- D.5 s
Model answer
What a good answer should say
- 2 s.
- the correct option
Explanation
Why this works
The correct answer is 2 s. 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.