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. Show your working one step at a time.
Model answer
What a good answer should say
- The final answer is 14 m s^-1.
- Use SUVAT because acceleration is constant.
- Choose v = u + at.
- Set u = 4.
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..
exam warm-up keeps the canonical answer 14 m s^-1 fixed before the model answer is written, so the worked solution and final answer agree.
Maths method check
- Topic focus: Mechanics.
- Question style: exam_style.
- Reasoning demand: recall.
- 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.