Begin your response to QUESTION 5 on this page. 5. (7 points, suggested time 13 minutes) In an experiment two identical rocks are simultaneously thrown from the edge of a cliff a distance ho above the ground. Rock A is thrown vertically upward with speed vo and rock B is thrown vertically downward with speed vo. Rock A and rock B strike the ground at times A and fg, respectively. Consider the positive vertical direction to be upward. (a) On the axes given below, sketch and label graphs of the velocity as a function of time for rock A and rock B. Label the time fg- Times A and - A are given on the graph. Velocity - - Time (b) Rock B hits the ground at time fg. Derive an equation for the time to it takes rock A to hit the ground in terms of vo, /B, and physical constants, as appropriate. Unauthorized copying or reuse of this page is illegal. Page 10 GO ON TO THE NEXT PAGE Use a pencil or a pen with black or dark blue ink. Do NOT write your name. Do NOT write outside the box