Exam-style question
Try this first
A particle of mass 4 kg has resultant force 16 N. Find the acceleration.
- A.4 m s^-2
- B.8
- C.0
- D.4 m s^-2 distractor 3
Model answer
What a good answer should say
- The correct answer is 4 m s^-2.
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..
Trace the calculation before choosing. The verified method for Quantities and units in mechanics gives 4 m s^-2; no later explanation is allowed to change that value.
Maths method check
- Topic focus: Mechanics.
- Question style: practice.
- Reasoning demand: analysis.
- 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.