Acceleration of a Ball Travelling in an arc

Think about the question below. Only one of the answers listed is correct. We'll do some (but probably not all) of these questions in the lectures when you will all be asked to vote on which answer you think is correct. (Soon afterwards, you'll be able to see your responses, and those of the whole class at EVAF.)

Graphic - No title - whatisaccn

A particle traces out the path shown, moving at constant speed. Consider its acceleration when it is at the highest point.

Which one of the following is correct?

1
It is perpendicular to the path, downwards
2
It is parallel to the path, either to the right or to the left
3
It is not possible to say