Exam-style question
Try this first
A particle of mass 3 kg has resultant force 15 N. Find the acceleration.
- A.5 m s^-2
- B.8
- C.2
- D.10
Model answer
What a good answer should say
- The correct answer is 5 m s^-2.
This answer is tied to the objective: J5 Use vectors to solve problems in pure mathematics and in context, including forces and kinematics..
Explanation
Why this works
Use the explanation to connect the worked answer back to J5 Use vectors to solve problems in pure mathematics and in context, including forces and kinematics..
The distractors change the result or the form of the answer. The canonical solution reaches 5 m s^-2, so 5 m s^-2 is the only option consistent with the working.
Maths method check
- Topic focus: Pure Mathematics - vectors.
- 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.