6. [1pt] The v-r graph represents the motion of a particle along a straight line. B 8- v (m/s) A O 2 6 7 -2- t (s) -4- For each of the following questions, select the appropriate answers from the choices below. E.g., if A and C answer the first question, and B is the answer for the remaining questions, enter ACBBB. (If a question has two or more answers, enter them alphabetically; enter N for "none'.) (Note that at point B, you cannot tell whether the speed is increasing or decreasing. Why?) i. When is the speed of the particle increasing? ii. When does the particle have the smallest speed (without stopping)? iii. When is the acceleration greater than zero? iv. When is the velocity less than zero? Answer: Submit All Answers Last Answer: buw Not yet correct, tries 1/15