Acceleration and Velocity

Oct 2017
530
250
Glasgow
i need help i dont understand this at all!!!
The questions are rather odd. However, I think the key to answering these questions is to recognise that acceleration is a vector. The important thing about vectors is that it's not only the magnitude which is important, but also the direction.
 
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Jun 2016
1,142
514
England
Not good questions

I personally dislike these sort of questions,
they are loosely scoped and allow for easy misinterpretation of the sort of answer being sought.

I think perhaps what they are seeking is that acceleration is change in velocity rather than change of speed.
so a change of direction requires an acceleration, but not necessarily a change of speed.

(Benit gave almost the same answer, but typed faster).