Exam-style question
Try this first
Use a checking method for this problem: A particle of mass 4 kg has resultant force 34 N. Find the acceleration. State the final answer and verify it against the information in the question.
Model answer
What a good answer should say
- A valid checked answer is 8.5 m s^-2.
- The method is: Use Newton's second law F = ma with a positive direction chosen.
- Set F = 34.
- Set m = 4.
This answer is tied to the objective: P1 Understand and use fundamental quantities and units in the SI system, including length, time and mass; understand and use derived quantities and units including velocity, acceleration, force, weight and moment..
Explanation
Why this works
Use the explanation to connect the worked answer back to P1 Understand and use fundamental quantities and units in the SI system, including length, time and mass; understand and use derived quantities and units including velocity, acceleration, force, weight and moment..
calculator check keeps the canonical answer 8.5 m s^-2 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.