Exam-style question
Try this first
A particle has u = 4 m s^-1, a = 2 m s^-2 and t = 5 s. Find v.
- A.14 m s^-1
- B.17
- C.11
- D.28
Model answer
What a good answer should say
- The correct answer is 14 m s^-1.
This answer is tied to the objective: Q3 Understand, use and derive the formulae for constant acceleration for motion in a straight line and extend to two dimensions using vectors..
Explanation
Why this works
Use the explanation to connect the worked answer back to Q3 Understand, use and derive the formulae for constant acceleration for motion in a straight line and extend to two dimensions using vectors..
The distractors change the result or the form of the answer. The canonical solution reaches 14 m s^-1, so 14 m s^-1 is the only option consistent with the working.
Maths method check
- Topic focus: Mechanics.
- Question style: practice.
- Reasoning demand: application.
- Check the operation, notation, units, and final answer form against the question before moving on.
Common mistake
No common mistake is linked to this question yet.