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.
- A.14 m s^-1
- B.17
- C.11
- D.28
Model answer
What a good answer should say
- The correct answer is 14 m s^-1.
This answer is tied to the objective: R6 Understand and use the F <= mu R model for friction, coefficient of friction, motion of a body on a rough surface, limiting friction and statics..
Explanation
Why this works
Use the explanation to connect the worked answer back to R6 Understand and use the F <= mu R model for friction, coefficient of friction, motion of a body on a rough surface, limiting friction and statics..
The distractors change the result or the form of the answer. The canonical solution reaches 14 m s^-1, so 14 m s^-1 is the only option consistent with the working.
Maths method check
- Topic focus: Mechanics.
- 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.