a) The section (or sections) of the graph during which there was a contact push/pull interaction between the foot and the ball b) The section (or sections) of the graph during which a force acted on the ball in the same direction as its motion Explain your reasoning for choosing these sections. $6. Two students in a previous class were discussing what they thought would happen if they could join many, many tracks together and arrange for a fan unit to push a cart along this extremely long track. I think that as long as the fan keeps pushing I agree that the cart will speed up for a while, but I on it, no matter how long the track is, the cart just don't believe it could keep speeding up forever. I will keep speeding up. think that at some point its speed will become constant. Han Samantha Based on your collected evidence, do you agree with Han, Samantha, or neither of them? Explain your thinking