I have two physics questions:
(a) What does the area under the acceleration-time graph represent? (Hint: it is NOT velocity or speed).
(b) What is a particle doing when the graph is above or below the axis? (Hint: a graph below the axis does NOT necessarily mean deceleration).
I suggest you review your class notes or textbook.
Originally Posted by demode
(a) Change in velocity.
(b) Above the axis: a > 0. Below the axis: a < 0. Note that if a < 0 for long enough the particle will slow down, stop and then move in the 'negative direction' ....