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: R3 Understand and use weight and motion in a straight line under gravity; use gravitational acceleration g and its value in SI units to varying degrees of accuracy; understand that g is not a universal constant and depends on location..
Explanation
Why this works
Use the explanation to connect the worked answer back to R3 Understand and use weight and motion in a straight line under gravity; use gravitational acceleration g and its value in SI units to varying degrees of accuracy; understand that g is not a universal constant and depends on location..
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.