B and E appear to be where the object changes direction. An earlier part of the question asked where velocity was 0 and those were the correct answers. Can you have acceleration without velocity?
Bumping an old thread for a little help on a similar question.
I am given a position vs time graph:
I am asked where acceleration is positive and where it is negative.
I believe I understand that when the slope of the line is increasing then the acceleration is positive. When the...